Vulnerability in Columbiaweather Weather Microserver
CVE-2025-61939
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.
EPSS: 0.003 (16.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- ics-cert@hq.dhs.gov (US Government Resource, Third Party Advisory)
- ics-cert@hq.dhs.gov (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-61939?
- CVE-2025-61939 is a high-severity vulnerability in Columbiaweather Weather Microserver, classified under CWE-923. CVSS score: 8.8/10. Published 2026-01-07.
- How severe is CVE-2025-61939?
- High severity. CVSS v3 base score is 8.8 out of 10.