CVE-2026-67279

Published Sep 5, 2026

Last updated 2 days ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-67279 describes a vulnerability in MikroTik RouterOS SSH where the system improperly handles a client-requested rekey operation. This flaw allows the SSH server to proceed to the connection protocol stage and accept session channel requests, even though user authentication has not been completed. As a result, an unauthenticated client can open an SSH session channel and issue `exec` requests. This capability permits the creation, overwriting, and reconstruction of files within the RouterOS managed file namespace, including critical configuration and diagnostic data.

Description: 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 creation, overwrite, and reconstruction of files in the RouterOS managed file namespace, including support files containing configuration and diagnostic data.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)
Source: cvd@cert.pl
NVD status: Awaiting Analysis

Risk scores

CVSS 4.0

Type: Secondary
Base score: 6.9
Impact score: -
Exploitability score: -
Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity: MEDIUM

Weaknesses

cvd@cert.pl: CWE-841

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 8

References