CVE Watch26 de set. de 2026

CVE-2026-67279

Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability

CVSS

6.5

Média

EPSS

2.3%

p83

KEV

SIM

25 de set. de 2026

Exploit Today

0-100

Publicado: 5 de set. de 2026 · Última mod.: 26 de set. de 2026 · CWE-841

EPSS · 30d

1.0%EPSS · 30 dias2.3%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

MikroTik / RouterOS

Vulnerabilidade

Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability

Adicionado ao KEV

25 de set. de 2026

Corrigir até

28 de set. de 2026

Uso conhecido em ransomware

Não

Descrição resumida

Mikrotik RouterOS contains an improper enforcement of behavioral workflow vulnerability that could allow an unauthenticated client to open a session channel and send an exec request. This vulnerability can be chained to achieve unauthenticated exploitation of CVE-2026-86060.

Ação necessária

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.

Notas

https://mikrotik.com/supportsec/september-2026-vulnerability ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-67279

Descrição técnica

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)

Referências oficiais

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