Vulnerability Description
An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to MicroServer can gain limited shell access, enabling persistence through reverse shells, and the ability to modify or remove data stored in the file system.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Columbiaweather | Weather Microserver Firmware | < MS_4.1_14142 |
| Columbiaweather | Weather Microserver | - |
Related Weaknesses (CWE)
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-00Third Party Advisory
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01Third Party AdvisoryUS Government Resource
FAQ
What is CVE-2025-66620?
CVE-2025-66620 is a vulnerability with a CVSS score of 8.0 (HIGH). An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to MicroServer can gain limited shell access, enabli...
How severe is CVE-2025-66620?
CVE-2025-66620 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-66620?
Check the references section above for vendor advisories and patch information. Affected products include: Columbiaweather Weather Microserver Firmware, Columbiaweather Weather Microserver.