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The two vulnerabilities impacting Sophos Firewall are listed below –

CVE-2025-6704 (CVSS score: 9.8) – An arbitrary file writing vulnerability in the Secure PDF eXchange (SPX) feature can lead

View CSAF

1. EXECUTIVE SUMMARY

• CVSS v3 9.4
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Honeywell
• Equipment: Experion PKS
• Vulnerabilities: Use of Uninitialized Variable, Improper Restriction of Operations within the Bounds of a Memory Buffer, Sensitive Information in Resource Not Removed Before Reuse, Integer Underflow (Wrap or Wraparound), Deployment of Wrong Handler

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could result in information exposure, denial of service, or remote code execution.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Honeywell reports these vulnerabilities affect the following:

• Experion PKS: All releases prior to R520.2 TCU9 Hot Fix 1
• Experion PKS: All releases prior to R530 TCU3 Hot Fix 1

3.2 Vulnerability Overview

3.2.1 Use of Uninitialized Variable CWE-457

The Honeywell Experion PKS contains an uninitialized variable in the common Epic Platform Analyzer (EPA) communications. An attacker could potentially exploit this vulnerability, leading to communication channel manipulation, which results in a dereferencing of an uninitialized pointer leading to a denial of service.

CVE-2025-2520 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).

3.2.2 Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-119

The Honeywell Experion PKS contains a memory buffer vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to overread buffers, which could result in improper index validation against buffer borders, leading to remote code execution.

CVE-2025-2521 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.6 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H).

3.2.3 Sensitive Information in Resource Not Removed Before Reuse CWE-226

The Honeywell Experion PKS contains sensitive information in resource vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to communication channel manipulation, which could result in buffer reuse, which may cause incorrect system behavior.

CVE-2025-2522 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:L/I:L/A:N).

3.2.4 Integer Underflow (Wrap or Wraparound) CWE-191

The Honeywell Experion PKS contains an integer underflow vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to communication channel manipulation, which could result in a failure during subtraction, allowing remote code execution.

CVE-2025-2523 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.4 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H).

3.2.5 Deployment of Wrong Handler CWE-430

The Honeywell Experion PKS contains a deployment of wrong handler vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to input data manipulation, which could result in incorrect handling of packets, leading to remote code execution.

CVE-2025-3946 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.2 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:H).

3.2.6 Integer Underflow (Wrap or Wraparound) CWE-191

The Honeywell Experion PKS contains an integer underflow vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to input data manipulation, which could result in improper integer data value checking during subtraction, leading to a denial of service.

CVE-2025-3947 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.2 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:H).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy, Healthcare and Public Health, Water and Wastewater Systems
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Positive Technologies reported these vulnerabilities to Honeywell.

4. MITIGATIONS

Honeywell recommends updating Experion PKS R520.2 TCU9 Hot Fix 1 or R530 TCU3 Hot Fix 1. For more information, see the Security Notice.

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

• Ensure the least-privilege user principle is followed.
• 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.

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

5. UPDATE HISTORY

• July 24, 2025: Initial Republication of Honeywell security notice.

View CSAF

1. EXECUTIVE SUMMARY

• CVSS v4 9.3
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Network Thermostat
• Equipment: X-Series WiFi thermostats
• Vulnerability: Missing Authentication for Critical Function

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to gain full administrative access to the device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Network Thermostat product is affected:

• X-Series WiFi thermostats: Versions v4.5 up to but not including v4.6
• X-Series WiFi thermostats: Versions v9.6 up to but not including v9.46
• X-Series WiFi thermostats: Versions v10.1 up to but not including v10.29
• X-Series WiFi thermostats: Versions v11.1 up to but not including v11.5

3.2 Vulnerability Overview

3.2.1 Missing Authentication for Critical Function CWE-306

The embedded web server on the thermostat listed version ranges contain a vulnerability that allows unauthenticated attackers, either on the Local Area Network or from the Internet via a router with port forwarding set up, to gain direct access to the thermostat’s embedded web server and reset user credentials by manipulating specific elements of the embedded web interface.

CVE-2025-6260 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-2025-6260. A base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities
• COUNTRIES/AREAS DEPLOYED: USA, Canada
• COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Souvik Kandar reported this vulnerability to CISA.

4. MITIGATIONS

Network Thermostat recommends users to update to the following (or newer) versions:

• X-Series WiFi thermostats with v4.x to a minimum of v4.6
• X-Series WiFi thermostats with v9.x to a minimum of v9.46
• X-Series WiFi thermostats with v10.x to a minimum of v10.29
• X-Series WiFi thermostats with v11.x to a minimum of v11.5

This update was applied automatically to reachable units, requiring no action from end users.

If end users would like their units behind firewalls to be updated, contact Network Thermostat at [email protected] to coordinate an update.

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.

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

5. UPDATE HISTORY

• July 24, 2025: Initial Publication

View CSAF

1. EXECUTIVE SUMMARY

• CVSS v3 7.0
• ATTENTION: Exploitable from a local network
• Vendor: Mitsubishi Electric
• Equipment: CNC Series
• Vulnerability: Uncontrolled Search Path Element

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to execute malicious code by getting setup-launcher to load a malicious DLL.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Mitsubishi Electric CNC Series are affected:

• NC Designer2: All versions
• NC Designer: All versions
• NC Configurator2: All versions
• NC Analyzer2: All versions
• NC Analyzer: All versions
• NC Explorer: All versions
• NC Monitor2: All versions
• NC Monitor: All versions
• NC Trainer2: “AB” and prior
• NC Trainer2 plus: “AB” and prior
• NC Trainer: All versions
• NC Trainer plus: All versions
• NC Visualizer: All versions
• Remote Monitor Tool: All versions
• MS Configurator: All versions
• Mitsubishi Electric Numerical Control Device Communication Software (FCSB1224): All versions
• Mitsubishi Electric CNC communication software runtime library M70LC/M730LC: All versions
• NC Virtual Simulator: All versions

3.2 Vulnerability Overview

3.2.1 UNCONTROLLED SEARCH PATH ELEMENT CWE-427

Malicious code execution vulnerability via DLL hijacking due to Uncontrolled Search Path Element (CWE-427) exists in Flexera InstallShield used in multiple software tools and industrial IoT-related products for Mitsubishi Electric CNC Series.

CVE-2016-2542 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.0 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

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

3.4 RESEARCHER

Sahil Shah reported this vulnerability to Mitsubishi Electric.

4. MITIGATIONS

The vulnerability is fixed in the following products and versions.  Download and install the fixed version from the Mitsubishi Electric download site:

• NC Trainer2: “AC” or later
• NC Trainer2 plus: “AC” or later

Note that there are no plans to release fixed versions for the following products:

• NC Designer
• NC Analyzer
• NC Monitor
• NC Trainer / NC Trainer plus
• NC Visualizer
• Remote Monitor Tool
• MS Configurator

For users of products that do not have a fixed version or who cannot immediately update the product, Mitsubishi Electric recommends taking the following mitigations to minimize the risk of exploiting this vulnerability:

• Restrict physical access to the computer using the product.
• Install an antivirus software in the computer using the affected product.
• Do not open untrusted files or click untrusted links.
• Do not run setup-launchers obtained from sources other than our branches, distributors or the Mitsubishi Electric FA website.
• Before running the setup-launcher, make sure that no DLL exists in the folder containing the setup-launcher executable file (the name varies depending on the product) for the product.

For more information, see Mitsubishi Electric 2025-008.

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.

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

• July 24, 2025: Initial Republication of Mitsubishi Electric 2025-008

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