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.
History

Wed, 07 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 07 Jan 2026 20:00:00 +0000

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: icscert

Published:

Updated: 2026-01-07T20:07:45.479Z

Reserved: 2025-12-08T19:17:55.922Z

Link: CVE-2025-61939

cve-icon Vulnrichment

Updated: 2026-01-07T20:07:34.839Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-07T21:15:58.753

Modified: 2026-01-08T18:08:54.147

Link: CVE-2025-61939

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.