Critical severityNVD Advisory· Published Sep 5, 2026· Updated Sep 5, 2026
CVE-2026-86060
CVE-2026-86060
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 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)
Affected products
1Patches
Vulnerability mechanics
References
7- cert.pl/en/posts/2026/09/mikrotik-routeros-cvenvd
- cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/nvd
- forum.mikrotik.com/t/6-49-21-long-term-is-released/272802nvd
- forum.mikrotik.com/t/7-23-4-long-term-is-released/272801nvd
- forum.mikrotik.com/t/7-24-2-stable-is-released/272800nvd
- mikrotik.com/supportsec/september-2026-vulnerability/nvd
- npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/nvd
News mentions
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