Certificate Validation Vulnerability in RouterOS by MikroTik
CVE-2025-42611

6.5MEDIUM

Key Information:

Vendor

Mikrotik

Status
Routeros
Vendor
CVE Published:
5 May 2026

What is CVE-2025-42611?

A vulnerability exists in RouterOS that stems from improper handling of certificate validation across multiple services. This flaw occurs due to shared trust in the system certificate store, which is utilized by various services including OpenVPN, CAPsMAN, and Dot1X. The lack of appropriate context for certificate trust may lead to authentication bypass, allowing malicious actors to exploit this weakness for unauthorized access or data interception. System administrators should assess their configurations and implement patches or updates to mitigate potential risks associated with this vulnerability.

Affected Version(s)

RouterOS 0 <= 7.20.x

References

https://www.cert.si/en/cve-2025-42611/
third-party-advisorygovernment-resource

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.