CVE-2026-67279
Mikrotik Routeros 6.0 – 6.49.21
Raw vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-67279 is a medium-severity Improper Enforcement of Behavioral Workflow (CWE-841) vulnerability in Mikrotik Routeros. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique External Remote Services (T1133); ranked in the top 48% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and IA-11 (Re-authentication) — see the control section below for these in your framework.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-72027
- 🇵🇱 CERT-PL: cert.pl
- 🇵🇱 CERT-PL: cert.pl
Vulnerability Data
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…
more
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)
- CWE(s)
- KEV Date Added
- 25 September 2026
Related Threats
MITRE ATT&CK Enterprise Techniques
Affected Assets
Mitigating Controls
Control response
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V7.2.1
Mitigating Controls (NIST 800-53 r5) AI
Access enforcement can require each successive workflow step to present the proper authorization context before proceeding.
Re-authentication requirements can be placed at critical workflow steps to ensure the actor has performed prior behaviors.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Enforcing authorization policies can include sequence constraints on multi-step actions.
Hardened configuration baselines can embed required workflow ordering rules.
Secure development practices directly address proper workflow enforcement during design and coding.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Secure development lifecycle requires explicit workflow enforcement in multi-step processes.
Application security requirements include sequencing and state-transition rules for critical workflows.
Secure architecture principles address proper ordering of security-critical operations.
Secure coding practices can prevent missing workflow checks but do not define the control itself.
Security testing can detect workflow bypasses but does not enforce them at runtime.
Change management can require workflow adherence for changes but is not the primary mitigation.