CVE-2026-67279
Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
MikroTik RouterOSNetwork & edge
CVSS
6.9MediumExploit odds (EPSS)1.05%Chance of exploitation activity in the next 30 days, higher than 63% of CVEs. Scored 23 Oct 2026FIRST EPSS
CISA required actionApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. CISA KEV
What fixes it
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Timeline
Description
Mikrotik RouterOS contains an improper enforcement of behavioral workflow vulnerability that could allow an unauthenticated client to open a session channel and send an exec request. This vulnerability can be chained to achieve unauthenticated exploitation of CVE-2026-86060.
Text from CVE List
Affected versions 3
- RouterOSaffected: 7.24 before 7.24.2CVE List
- RouterOSaffected: 7.0.0 before 7.23.4CVE List
- RouterOSaffected: 6.0.0 before 6.49.21CVE List
References 11
- cert.pl/en/posts/2026/09/mikrotik-routeros-cveAdvisoryvia CVE List
- cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/Advisoryvia CVE List
- mikrotik.com/supportsec/september-2026-vulnerability/Advisoryvia CVE List
- bishopfox.com/blog/mikrotrick-inside-the-routeros-takeover-chainAdvisoryvia CVE List
- npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/Exploitvia CVE List
- mikrotik.com/supportsec/september-2026-vulnerabilityReferencevia CISA KEV
- nvd.nist.gov/vuln/detail/CVE-2026-67279Referencevia CISA KEV
- forum.mikrotik.com/t/6-49-21-long-term-is-released/272802Referencevia CVE List
- forum.mikrotik.com/t/7-23-4-long-term-is-released/272801Referencevia CVE List
- forum.mikrotik.com/t/7-24-2-stable-is-released/272800Referencevia CVE List
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-67279Referencevia CVE List