CVE-2026-67277: MikroTik RouterOS Missing Authentication for Critical Function Vulnerability

Added to the CISA Known Exploited Vulnerabilities catalog on 10 Sep 2026. Vendor: MikroTik. Product: RouterOS.

MikroTik RouterOS contains a missing authenticaion for critical function vulnerability which allows kernel memory disclosure and denial of service in the btest service.

Required action: Apply 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. (due 13 Sep 2026)