CVE-2026-86060

SSH session privilege manipulation via a crafted username in Mikrotik RouterOS

CVSS 9.2 critical · Mikrotik RouterOS · published 2026-09-05

RouterOS contains an argument-handling flaw in the SSH login path involving usernames that begin with a prohibited character, allowing for the trusted RouterOS policy mask to be changed, leading to privilege escalation. Exploitation requires an unauthenticated SSH session to reach the RouterOS login helper.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)

NVD · CVE.org

Coverage 1 source

1. 2026-09-10 CISA Cybersecurity Advisories high CISA Adds Two Known Exploited Vulnerabilities to Catalog

   CISA added two MikroTik RouterOS vulnerabilities to its Known Exploited Vulnerabilities Catalog.

Mentioned with

CVE-2026-67277

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