CVE-2025-61939

HIGH

8.8

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.

CVE Details

CVSS v3.1 Score8.8

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published1/7/2026

Last Modified1/22/2026

Sourcenvd

Honeypot Sightings0

Affected Products

columbiaweather:weather_microservercolumbiaweather:weather_microserver_firmware

Weaknesses (CWE)

CWE-923

References

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json(ics-cert@hq.dhs.gov)

https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01(ics-cert@hq.dhs.gov)

IOC Correlations

No correlations recorded

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