CVE-2025-61939

Columbia Weather Systems MicroServer Improper Restriction of Communication Channel to Intended Endpoints

Published Jan 7, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Columbia Weather Systems recommends users update the MicroServer firmware to version MS_4.1_14142 or later. To obtain the update, users should contact Columbia Weather Systems Support directly via email (support@columbiaweather.com) or phone (503-629-0887) for assistance.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Columbiaweather
Columbiaweather weather Microserver
Columbiaweather weather Microserver Firmware
CPEs cpe:2.3:h:columbiaweather:weather_microserver:-:*:*:*:*:*:*:*
cpe:2.3:o:columbiaweather:weather_microserver_firmware:*:*:*:*:*:*:*:*
Vendors & Products Columbiaweather
Columbiaweather weather Microserver
Columbiaweather weather Microserver Firmware
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Columbia Weather Systems MicroServer Improper Restriction of Communication Channel to Intended Endpoints
Weaknesses CWE-923
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Jan 7, 2026, 8:07 PM
Reserved
Dec 8, 2025, 7:17 PM
Status
Analyzed
Published
Jan 7, 2026, 9:15 PM
Modified
Oct 7, 2026, 9:10 AM