CVE-2026-86060
Critical · 9.8 CISA KEVCVSS
9.8
EPSS
6.4%
Published
Sep 5, 2026
CISA due date
Sep 13, 2026
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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