MikroTik RouterOS 6.x < 6.49.21 / 7.0.x < 7.23.4 / 7.24.x < 7.24.2 Multiple Vulnerabilities

According to its self-reported version, the remote networking device is running a version of MikroTik RouterOS 6.x prior to 6.49.21, or 7.0.x prior to 7.23.4, or 7.24.x prior to 7.24.2. It is, therefore, affected by multiple vulnerabilities : - RouterOS accepts a 'related' btest connection before...

CVE-2026-67279

The MikroTik RouterOS SSH server is vulnerable to an authentication bypass (CVE-2026-67279) where a client-requested rekey before authentication triggers the server to enter the connection protocol without verifying user credentials. This allows unauthenticated clients to open session channels an...

CVE-2026-67279 SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS

RouterOS SSH enters the connection protocol after a client-requested rekey even though user authentication was never attempted, allowing an unauthenticated client to open a session channel and send an exec request. On affected builds the server dispatches the command, enabling unauthenticated...

EUVD-2026-72027

RouterOS SSH enters the connection protocol after a client-requested rekey even though user authentication was never attempted, allowing an unauthenticated client to open a session channel and send an exec request. On affected builds the server dispatches the command, enabling unauthenticated...

PT-2026-86454

Name of the Vulnerable Software and Affected Versions RouterOS versions prior to 6.49.21 Long-term RouterOS versions prior to 7.23.4 Long-term RouterOS versions prior to 7.24.2 Stable Description The SSH server improperly enforces the behavioral workflow during a client-requested rekey. This allo...