News & Updates

Tonverk is Elektron’s new polyphonic sample mangler and groovebox

Elektron has built a cult-like following over the years with its unique and, at times, esoteric take on electronic musical instruments. On paper, Tonverk is a seemingly over-powered sampler that continues that tradition. It’s the rare piece of hardware capable of creating multisampled instruments on its own. It turns a single sample track into a […]
News & Updates

Siemens Industrial Edge Management OS (IEM-OS)

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v4 8.7
  • ATTENTION: Exploitable remotely/low attack complexity
  • Vendor: Siemens
  • Equipment: Industrial Edge Management OS (IEM-OS)
  • Vulnerability: Allocation of Resources Without Limits or Throttling

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow a remote attacker to cause a denial-of-service condition.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

  • Industrial Edge Management OS (IEM-OS): All versions

3.2 VULNERABILITY OVERVIEW

3.2.1 ALLOCATION OF RESOURCES WITHOUT LIMITS OR THROTTLING CWE-770

Allocation of resources for multipart headers with insufficient limits enables a denial-of-service vulnerability in Apache Commons FileUpload.

CVE-2025-48976 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

A CVSS v4 score has also been calculated for CVE-2025-48976. A base score of 8.7 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Siemens reported this vulnerability to CISA.

4. MITIGATIONS

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

  • Migrate to Industrial Edge Management Virtual (IEM-V).
  • Limit access to trusted users and systems only.

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.

For more information, see the associated Siemens security advisory SSA-640476 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as virtual private networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

  • September 11, 2025: Initial Republication of Siemens SSA-640476
News & Updates

Siemens SINAMICS Drives

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v4 6.9
  • ATTENTION: Exploitable from a local network
  • Vendor: Siemens
  • Equipment: SINAMICS Drives
  • Vulnerability: Improper Privilege Management

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow users to escalate their privileges.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

  • Siemens SINAMICS G220 V6.4: Versions prior to V6.4 HF2
  • Siemens SINAMICS S200 V6.4: All versions
  • Siemens SINAMICS S210 V6.4: Versions prior to V6.4 HF2

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER PRIVILEGE MANAGEMENT CWE-269

The affected devices allow a factory reset to be executed without the required privileges due to improper privilege management as well as manipulation of configuration data because of leaked privileges of previous sessions. This could allow an unauthorized attacker to escalate their privileges.

CVE-2025-40594 has been assigned to this vulnerability. A CVSS v3.1 base score of 6.3 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L).

A CVSS v4 score has also been calculated for CVE-2025-40594. A base score of 6.9 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Siemens ProductCERT reported this vulnerability to CISA.

4. MITIGATIONS

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

  • SINAMICS S200 V6.4: Currently has no fix available.
  • SINAMICS S210 V6.4: Update to V6.4 HF2 or later version.
  • SINAMICS G220 V6.4: Update to V6.4 HF2 or later version.

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-027652 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely. This vulnerability has a high attack complexity.

5. UPDATE HISTORY

  • September 11, 2025: Initial Republication of Siemens ProductCERT SSA-027652
News & Updates

Siemens SIMOTION Tools

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v3 8.1
  • ATTENTION: Exploitable locally
  • Vendor: Siemens
  • Equipment: SIMOTION Tools
  • Vulnerability: Improper Check for Unusual or Exceptional Conditions

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code with SYSTEM privileges when a legitimate user installs an application that uses the affected setup component.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

  • SIMATIC Technology Package TPCamGen (6ES7823-0FE30-1AA0): All versions
  • SIMOTION OA MIIF (6AU1820-3DA20-0AB0): All versions
  • SIMOTION OACAMGEN (6AU1820-3EA20-0AB0): All versions
  • SIMOTION OALECO (6AU1820-3HA20-0AB0): All versions
  • SIMOTION OAVIBX (6AU1820-3CA20-0AB0): All versions

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER CHECK FOR UNUSUAL OR EXCEPTIONAL CONDITIONS CWE-754

Nullsoft Scriptable Install System (NSIS) before 3.11 on Windows allows local users to escalate privileges to SYSTEM during an installation, because the temporary plugins directory is created under %WINDIR%temp and unprivileged users can place a crafted executable file by winning a race condition. This occurs because EW_CREATEDIR does not always set the CreateRestrictedDirectory error flag.

CVE-2025-43715 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.1 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Siemens reported this vulnerability to CISA.

4. MITIGATIONS

Siemens reports that no fix currently is available. Siemens has also identified the following workarounds and mitigations users can apply to reduce risk:

  • Ensure that no other users are logged in and that no unknown programs are running before starting the installation of the affected products

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-563922 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely. This vulnerability has a high attack complexity.

5. UPDATE HISTORY

  • September 11, 2025: Initial Republication of Siemens SSA-563922
News & Updates

Schneider Electric Modicon M340, BMXNOE0100, and BMXNOE0110

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v4 6.9
  • ATTENTION: Exploitable remotely/low attack complexity
  • Vendor: Schneider Electric
  • Equipment: Modicon M340, BMXNOE0100, and BMXNOE0110
  • Vulnerability: Files or Directories Accessible to External Parties

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow attackers to prevent firmware updates and disrupt the webserver’s proper behavior by removing specific files or directories from the filesystem.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Schneider Electric reports that the following products are affected:

  • Modicon M340: All versions
  • Modbus/TCP Ethernet Modicon M340 module: Versions prior to SV3.60
  • Modbus/TCP Ethernet Modicon M340 FactoryCast module: Versions prior to SV6.80

3.2 VULNERABILITY OVERVIEW

3.2.1 FILES OR DIRECTORIES ACCESSIBLE TO EXTERNAL PARTIES CWE-552

A Files or Directories Accessible to External Parties vulnerability exists which may prevent user to update the device firmware and prevent proper behavior of the webserver when specific files or directories are removed from the filesystem.

CVE-2024-5056 has been assigned to this vulnerability. A CVSS v3.1 base score of 6.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).

A CVSS v4 score has also been calculated for CVE-2024-5056. A base score of 6.9 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical Manufacturing, Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: France

3.4 RESEARCHER

Yanis Wang of DAS-Security reported this vulnerability to Schneider Electric. Schneider Electric reported this vulnerability to CISA.

4. MITIGATIONS

Schneider Electric has identified the following specific workarounds and mitigations users can apply to reduce risk:

Modbus/TCP Ethernet Modicon M340 module: Version SV3.60 of BMXNOE0100 includes a fix for this vulnerability and is available for download here.

Modbus/TCP Ethernet Modicon M340 FactoryCast module: Version SV6.80 of BMXNOE0110 includes a fix for this vulnerability and is available for download here.

Schneider Electric is establishing a remediation plan for all future versions of Modicon M340 that will include a fix for this vulnerability. They will provide an update when the remediation is available. Until then, users should immediately apply the following mitigations to reduce the risk of exploit:

  • Set up network segmentation and implement a firewall to block all unauthorized access to FTP port 21/TCP on the devices.
  • FTP service is disabled by default. Deactivate the FTP service after use when not needed.
  • Configure the Access Control List following the recommendations of the user manual “Modicon M340 for Ethernet Communications Modules and Processors User Manual” in chapter “Messaging Configuration Parameters”.

For more information see the associated Schneider Electric CPCERT security advisory SEVD-2024-163-01, SEVD-2024-163-01 CSAF Version.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

  • September 11, 2025: Initial Republication of Schneider Electric CPCERT SEVD-2024-163-01
News & Updates

Siemens SIMATIC Virtualization as a Service (SIVaaS)

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v4 9.3
  • ATTENTION: Exploitable remotely/low attack complexity
  • Vendor: Siemens
  • Equipment: SIVaaS
  • Vulnerability: Incorrect Permission Assignment for Critical Resource

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to access or alter sensitive data without proper authorization.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

  • SIMATIC Virtualization as a Service (SIVaaS): All versions

3.2 VULNERABILITY OVERVIEW

3.2.1 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732

The affected application exposes a network share without any authentication. This could allow an attacker to access or alter sensitive data without proper authorization.

CVE-2025-40804 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.1 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

A CVSS v4 score has also been calculated for CVE-2025-40804. A base score of 9.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Tim Dijkman from Powerspex reported this vulnerability to Siemens.

4. MITIGATIONS

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

  • SIMATIC Virtualization as a Service (SIVaaS): Contact Technical Support for assistance

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-534283 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

  • September 11, 2025: Initial Republication of Siemens SSA
News & Updates

Daikin Security Gateway

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v4 8.8
  • ATTENTION: Exploitable remotely/low attack complexity/public exploits are available
  • Vendor: Daikin
  • Equipment: Security Gateway
  • Vulnerability: Weak Password Recovery Mechanism for Forgotten Password

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to gain unauthorized access to the system.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Daikin Security Gateway are affected:

  • Security Gateway: App: 100, Frm: 214

3.2 VULNERABILITY OVERVIEW

3.2.1 WEAK PASSWORD RECOVERY MECHANISM FOR FORGOTTEN PASSWORD CWE-640

Daikin Security Gateway is vulnerable to an authorization bypass through a user-controlled key vulnerability that could allow an attacker to bypass authentication. An unauthorized attacker could access the system without prior credentials.

CVE-2025-10127 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2025-10127. A base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Japan

3.4 RESEARCHER

CISA discovered a public Proof of Concept (PoC) as authored by Gjoko Krstic and reported it to Daikin.

4. MITIGATIONS

Daikin has reported they will not fix this vulnerability and will respond directly to user inquiries.

For more information, contact Daikin customer support.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

  • September 11, 2025: Initial Publication
News & Updates

Siemens SINEC OS

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v4 2.3
  • ATTENTION: Exploitable from adjacent network
  • Vendor: Siemens
  • Equipment: SINEC OS
  • Vulnerabilities: Uncontrolled Resource Consumption, Exposure of Sensitive Information to an Unauthorized Actor

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to access non-sensitive information without authentication or potentially cause a temporary denial of service.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00): All versions

3.2 VULNERABILITY OVERVIEW

3.2.1 UNCONTROLLED RESOURCE CONSUMPTION CWE-400

The affected device may be susceptible to resource exhaustion when subjected to high volumes of query requests. This could allow an attacker to cause a temporary denial of service, with the system recovering once the activity stops.

CVE-2025-40802 has been assigned to this vulnerability. A CVSS v3.1 base score of 3.1 has been calculated; the CVSS vector string is (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

A CVSS v4 score has also been calculated for CVE-2025-40802. A base score of 2.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N).

3.2.2 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200

The affected device exposes certain non-critical information from the device. This could allow an unauthenticated attacker to access sensitive data, potentially leading to a breach of confidentiality.

CVE-2025-40803 has been assigned to this vulnerability. A CVSS v3.1 base score of 3.1 has been calculated; the CVSS vector string is (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).

A CVSS v4 score has also been calculated for CVE-2025-40803. A base score of 2.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Siemens ProductCERT reported these vulnerabilities to CISA.

4. MITIGATIONS

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

  • RUGGEDCOM RST2428P (6GK6242-6PA00): Create a firewall rule that blocks the UDP ports if not required. The device uses UDP 34964 and one port in range 49152-65535 for discovery protocols like LLDP, DCP, MRP etc.

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-494539 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely. These vulnerabilities have a high attack complexity.

5. UPDATE HISTORY

  • September 11, 2025: Initial Republication of Siemens ProductCERT SSA-494539
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