Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run RouterOS, fix it now.
CISA 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.
US federal civilian agencies must remediate by Sep 28, 2026.
No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.
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)
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
| Product | Vendor | Affected versions | Fixed in | Source |
|---|---|---|---|---|
| RouterOS | MikroTik | >= 6.0, < 6.49.21; >= 7.0, < 7.23.4; >= 7.24, < 7.24.2 | 6.49.21; 7.23.4; 7.24.2 | KEV |
Sources: KEV = CISA Known Exploited Vulnerabilities catalog.
Developments from the last 30 days, newest first.
CVE-2026-67279 scored CVSS 6.9: MikroTik RouterOS, Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
CISA lists this as exploited in the wild. Unpatched RouterOS systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
CVE-2026-67279 added to CISA KEV: MikroTik RouterOS, Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
CISA lists this as exploited in the wild. Unpatched RouterOS systems are exposed to active attacks now.
Basis: CISA Known Exploited Vulnerabilities catalog
CISA lists this as exploited in the wild. Unpatched SharePoint and RouterOS systems are exposed to active attacks now.
Apply the vendor's security update for SharePoint and RouterOS.
CISA lists this as exploited in the wild. Unpatched RouterOS systems are exposed to active attacks now.
Treat this as an emergency.
