Vulnerability in RouterOS SSH Allows Unauthorized Command Execution
CVE-2026-67279

6.9MEDIUM

Key Information:

Vendor

Mikrotik

Status
Routeros
Vendor
CVE Published:
5 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-67279?

The RouterOS SSH service is vulnerable due to improper authentication, enabling unauthenticated clients to establish a session channel after a rekey request. This flaw allows attackers to send execution requests without user credentials, leading to unauthorized command execution and potential alteration of files, including critical configuration and diagnostic data. The issue has been patched in versions 6.49.21 (Long-term), 7.23.4 (Long-term), and 7.24.2 (Stable).

Affected Version(s)

RouterOS 7.24 < 7.24.2

RouterOS 7.0.0 < 7.23.4

RouterOS 6.0.0 < 6.49.21

References

https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve
third-party-advisory
https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikro...
technical-description
https://npratley.net/reversing-mikrotiks-silent-patch-the...
exploit

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sławomir Rozbicki (CERT.PL)
.