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CVE-2025-42611

6.5 · MEDIUM

RouterOS provides various services that rely on correct verification of client and server certificates to secure confidentiality and integrity of communications.

Published May 5, 2026CWE-295EPSS 0.19%

Overview

CVE-2025-42611 is a medium-severity vulnerability. It was published on May 5, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

RouterOS provides various services that rely on correct

verification of client and server certificates to secure confidentiality and

integrity of communications. This includes OpenVPN, CAPsMAN, Dot1x (802.1X),

among others.

The vulnerability lies in shared certificate validation

logic which uses the system certificate store that is shared and equally

trusted by all system services. This causes confusion of scope, allowing any

certificate authority present in the system-wide trust store to be trusted in

any context (with some exceptions), allowing partial or full authentication

bypass in CAPsMAN, OpenVPN, Dot1X and potentially others.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.cert.si/en/cve-2025-42611/

How CyberStrike helps

Frequently asked questions

What is CVE-2025-42611?

CVE-2025-42611 is a medium-severity vulnerability. It was published on May 5, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-42611?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-42611?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-42611?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-42611 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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