Columbia Weather Systems MicroServer prior MS_4.1_14142 communication channel to intended endpoints

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in Columbia Weather Systems MicroServer and classified as very critical. The impacted element is an unknown function. Performing a manipulation results in communication channel to intended endpoints. This vulnerability is identified as CVE-2025-61939. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Columbia Weather Systems MicroServer. This affects an unknown part. The manipulation with an unknown input leads to a communication channel to intended endpoints vulnerability. CWE is classifying the issue as CWE-923. The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at cisa.gov. This vulnerability is uniquely identified as CVE-2025-61939 since 12/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/23/2026).

Upgrading to version MS_4.1_14142 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔒

CNA Base Score: 8.8
CNA Vector (icscert): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Communication channel to intended endpoints
CWE: CWE-923
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: MicroServer MS_4.1_14142

Timelineinfo

12/08/2025 CVE reserved
01/07/2026 +30 days Advisory disclosed
01/07/2026 +0 days VulDB entry created
01/23/2026 +16 days VulDB entry last update

Sourcesinfo

Advisory: icsa-26-006-01
Status: Confirmed

CVE: CVE-2025-61939 (🔒)
GCVE (CVE): GCVE-0-2025-61939
GCVE (VulDB): GCVE-100-339951

Entryinfo

Created: 01/07/2026 22:27
Updated: 01/23/2026 11:23
Changes: 01/07/2026 22:27 (74), 01/23/2026 11:23 (11)
Complete: 🔍
Cache ID: 216::103

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