CVE-2026-86060
SSH session privilege manipulation via a crafted username in Mikrotik RouterOS
- Published
- Sep 5, 2026
- Updated
- Sep 11, 2026
- Assigning CNA
- CERT-PL
- Evidence observed
- Sep 10, 2026
Primary CVSS
nvd · CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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:XLow · next 30 days
- Percentile
- 62.5%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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)
Sources
2- cve-2026-86060Informational
Advisory for CVE-2026-86060, a critical pre-auth privilege escalation in MikroTik RouterOS SSH, with impact analysis, detection guidance, and hardening steps.
- MicroTrickPoC
Self-contained Python PoC exploiting the MikroTrick SSH chain (CVE-2026-86060, CVE-2026-67279) to gain unauthenticated full admin access on MikroTik RouterOS devices.
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