Vulnerability · Published Jan 7, 2026 · Assigned by icscert
CVE-2025-66620Columbia Weather Systems MicroServer Command Shell in Externally Accessible Directory
High 8.0
In plain English
A high-severity security flaw in MicroServer from Columbia Weather Systems. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.5%top 59.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Columbia Weather Systems | MicroServer | 0 – before MS_4.1_14142 |
Weakness: CWE-553 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H