CVE-2025-66620
moderate-risk
Published 2026-01-07
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.
Do I need to act?
-
0.07% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.0/10
High
ADJACENT_NETWORK
/ LOW complexity
Affected Products (1)
Weather Microserver Firmware
Affected Vendors
References (2)
Third Party Advisory
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-00...
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01
30
/ 100
moderate-risk
Severity
25/34 · High
Exploitability
0/34 · Minimal
Exposure
5/34 · Minimal