CVE-2026-67279
Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
RouterOS SSH enters the connection protocol after a client-requested rekey even though user authentication was never attempted, allowing an unauthenticated client to open a session channel and send an exec request. On affected builds the server dispatches the command, enabling unauthenticated creation, overwrite, and reconstruction of files in the RouterOS managed file namespace, including support files containing configuration and diagnostic data.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)
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. Deadline for federal agencies: 2026-09-28.
6 articles across 5 outlets · first covered Sep 7, 2026 · latest Sep 25, 2026
Coverage timeline
-
CISA Warns of Active MikroTik RouterOS Attacks and SharePoint Flawsecurityaffairs.com · Sep 25, 2026
-
CISA Flags Actively Exploited SharePoint and MikroTik Flawswww.cisa.gov · Sep 25, 2026
-
Actively Exploited MikroTik RouterOS Flaw Enables Unauthenticated Attackscisa.gov · Sep 25, 2026
-
MikroTik Routers Hacked Using Dual Flaws to Bypass Passwordssecurityaffairs.com · Sep 24, 2026
-
MikroTik Patches Exploited RouterOS Flaws in MikrTrick Attack Chainwww.securityweek.com · Sep 8, 2026
-
MikroTik RouterOS Attacks Exploit MikroTrick Flaws for Full Controlsecurityonline.info · Sep 7, 2026