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Summary
Successful exploitation of these vulnerabilities could allow an attacker to redirect the SSH connection to an attacker controlled device, gain admin access to the web portal, and gain limited shell access.
The following versions of Columbia Weather Systems MicroServer are affected:
- MicroServer firmware (CVE-2025-61939, CVE-2025-64305, CVE-2025-66620)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 8.8 | Columbia Weather Systems | Columbia Weather Systems MicroServer | Improper Restriction of Communication Channel to Intended Endpoints, Cleartext Storage in a File or on Disk, Command Shell in Externally Accessible Directory |
Background
- Critical Infrastructure Sectors: Information Technology
- Countries/Areas Deployed: United States
- Company Headquarters Location: United States
Vulnerabilities
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CVE-2025-61939
An unused function in the MicroServer can start a reverse ssh connection to a vendor registered domain, without mutual authentication. An attacker on the local network with admin access to the web server, and the ability to manipulate DNS responses, can redirect the SSH connection to an attacker controlled device.
View CVE Details
Affected Products
Columbia Weather Systems MicroServer
Columbia Weather Systems
Columbia Weather Systems MicroServer firmware: <MS_4.1_14142
known_affected
Remediations
Vendor fix
Columbia Weather Systems recommends users update the MicroServer firmware to version MS_4.1_14142 or later. To obtain the update, users should contact Columbia Weather Systems Support directly for assistance.
Relevant CWE: CWE-923 Improper Restriction of Communication Channel to Intended Endpoints
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVE-2025-64305
The MicroServer copies parts of the system firmware to an unencrypted external SD card on boot, which contains user and vendor secrets. An attacker can utilize these plaintext secrets to modify the vendor firmware, or gain admin access to the web portal.
View CVE Details
Affected Products
Columbia Weather Systems MicroServer
Columbia Weather Systems
Columbia Weather Systems MicroServer firmware: <MS_4.1_14142
known_affected
Remediations
Vendor fix
Columbia Weather Systems recommends users update the MicroServer firmware to version MS_4.1_14142 or later. To obtain the update, users should contact Columbia Weather Systems Support directly for assistance.
Relevant CWE: CWE-313 Cleartext Storage in a File or on Disk
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
CVE-2025-66620
An unused webshell in the MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to the MicroServer can gain limited shell access, enabling persistence through reverse shells, and the ability to modify or remove data stored in the file system.
View CVE Details
Affected Products
Columbia Weather Systems MicroServer
Columbia Weather Systems
Columbia Weather Systems MicroServer firmware: <MS_4.1_14142
known_affected
Remediations
Vendor fix
Columbia Weather Systems recommends users update the MicroServer firmware to version MS_4.1_14142 or later. To obtain the update, users should contact Columbia Weather Systems Support directly for assistance.
Relevant CWE: CWE-553 Command Shell in Externally Accessible Directory
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 8 | HIGH | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Acknowledgments
- UsrPacific reported these vulnerabilities to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
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), 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.
Revision History
- Initial Release Date: 2025-01-06
| Date | Revision | Summary |
|---|---|---|
| 2026-01-06 | 1 | Initial Publication |