Exploitation active confirmée

Ajoutée au catalogue CISA KEV le 25/09/2026, correctif exigé avant le 28/09/2026 pour les agences fédérales américaines.

Action requise : 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.

Description officielle (NVD)

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)

Preuves de concept publiques (4)

Dépôts tiers non vérifiés, parfois piégés. Ne les exécutez jamais en production : uniquement dans un environnement de test isolé.

tc4dy/CVE-2026-67279-86060-Toolkit · ★ 5 · 27/09/2026
CVE-2026-67279 + CVE-2026-86060 – MikroTrick MikroTik RouterOS SSH Pre-Auth Takeover (CVSS 9.2) | Red/Blue Team suite. 2 tools: Full Exploit (rekey bypass, fd-2 policy swap, full-admin shell, plant, m
HackSpeak/CVE-2026-67279 · ★ 4 · 26/09/2026
MikroTrick (MikroTik RouterOS SSH takeover chain) PoC mirror - CVE-2026-67279 + CVE-2026-86060 (+67276); for authorized lab testing
shmaki4/CVE-2026-67279-Mikrotik-6.42-POC · ★ 0 · 08/10/2026
Laboratory proof of concept and research notes for CVE-2026-67279 on MikroTik RouterOS 6.42.
GoldAden/mikrotrick-verifier · ★ 0 · 17/10/2026
Non-destructive behavioral verifier for the MikroTik RouterOS SSH auth-bypass (CVE-2026-67279 / MikroTrick). Measures server reaction only — no exploit payload.

Références

https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve , Third Party Advisory
https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/ , Mitigation, Third Party Advisory
https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802 , Release Notes
https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801 , Release Notes
https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800 , Release Notes
https://mikrotik.com/supportsec/september-2026-vulnerability/ , Vendor Advisory
https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/ , Exploit, Third Party Advisory
https://bishopfox.com/blog/mikrotrick-inside-the-routeros-takeover-chain , Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-67279 , US Government Resource

En bref

Éditeur	MikroTik
Produit	RouterOS
Publiée le	05/09/2026
Modifiée le	26/09/2026
CVSS	6.9 (v4.0)
EPSS	1,05 % (centile 64)
CWE	CWE-841

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:X

EPSS : probabilité estimée d'exploitation dans les 30 prochains jours.