CVE-2026-86060 – SSH session privilege manipulation via a crafted username in Mikrotik RouterOS

​CVE ID :CVE-2026-86060

Published : Sept. 5, 2026, 8:17 p.m. | 56 minutes ago

Description :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 (Lont-term), 7.23.4 (Lont-term) and 7.24.2 (Stable)

Severity: 9.2 | CRITICAL

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