High 8.8Published Jan 7, 2026

CVE-2025-61939Columbia Weather Systems MicroServer Improper Restriction of Communication Channel to Intended Endpoints

Updated under an hour ago (Oct 28, 2026, 6:20 PM ET)

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It affects Columbia Weather Systems MicroServer and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Columbia Weather Systems MicroServer

Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-923
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: icscert
NVD analysis: Analyzed
Record last updated: Jan 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Columbia Weather Systems MicroServer columbia_weather_systems:microserver (from the name)	before MS_4.1_14142	CNA record
columbiaweather weather_microserver_firmware columbiaweather:weather_microserver_firmware	before MS_4.1_14142	NVD

References

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01	third-party-advisory, us-government-resource
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.