Is CVE-2025-61939 actively exploited?

CVE-2025-61939 has no public evidence of in-the-wild exploitation as of 2026-01-22.

What is the CVSS score for CVE-2025-61939?

CVE-2025-61939 has a CVSS score of 8.7 (HIGH severity). 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2025-61939?

Patch guidance is available from columbiaweather security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-61939.

Which products are affected by CVE-2025-61939?

1 product: columbiaweather weather microserver firmware.

Fix CVE-2025-61939 - HIGH | CVEDatabase.com

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.

CVSS Metrics

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-923

Metadata

Primary Vendor: COLUMBIAWEATHER
Published: 1/7/2026
Last Modified: 1/22/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

columbiaweather : weather_microserver_firmware

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-61939. CVEDatabase.com. Retrieved 3 May 2026. https://cvedatabase.com/cve/CVE-2025-61939

View on NIST NVD

CVE-2025-61939 vulnerability