Vulnerability in Columbiaweather Weather Microserver
CVE-2025-66620
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.
EPSS: 0.005 (37.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/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-2025-66620?
- CVE-2025-66620 is a high-severity vulnerability in Columbiaweather Weather Microserver, classified under CWE-553. CVSS score: 8.0/10. Published 2026-01-07.
- How severe is CVE-2025-66620?
- High severity. CVSS v3 base score is 8.0 out of 10.