Summary
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.
Remediation
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.
References
- Advisoryhttps://mikrotik.com/supportsec/september-2026-vulnerability
- Advisoryhttps://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- Advisoryhttps://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- Advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-67279
- Advisoryhttps://cert.pl/en/posts/2026/09/mikrotik-routeros-cve
- Advisoryhttps://mikrotik.com/supportsec/september-2026-vulnerability/
- Advisoryhttps://bishopfox.com/blog/mikrotrick-inside-the-routeros-takeover-chain
- Referencehttps://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
- Referencehttps://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
- Referencehttps://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802
- Referencehttps://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801
- Referencehttps://forum.mikrotik.com/t/7-24-2-stable-is-released/272800