Vulnerability · Published Jan 7, 2026 · Assigned by icscert
CVE-2025-61939Columbia Weather Systems MicroServer Improper Restriction of Communication Channel to Intended Endpoints
High 8.8
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 0.3% (higher than 19% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.3%top 80.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An unused function in 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Columbia Weather Systems | MicroServer | 0 – before MS_4.1_14142 |
Weakness: CWE-923 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H