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UNKNOWN CISA KEV

CVE-2026-86060

CVSS v3

—

Unknown

EPSS Score

0.4 %

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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)

CISA Known Exploited Vulnerability

Date Added
2026-09-10
Patch Due Date
2026-09-13
Ransomware Use
Unknown

Technical details

Published
2026-09-05
Last Modified
2026-09-05

Frequently asked questions

What is CVE-2026-86060?

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)

Is CVE-2026-86060 actively exploited?

Yes. CVE-2026-86060 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-09-13.

What is the CVSS score for CVE-2026-86060?

A CVSS score has not been assigned to CVE-2026-86060 yet.

Is CVE-2026-86060 affecting your environment?

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