CVE Watch11 sept 2026

CVE-2026-86060

MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability

CVSS

9.8

Crítico

EPSS

6.4%

p94

KEV

SÍ

10 sept 2026

Exploit Today

0-100

Publicado: 5 sept 2026 · Última mod.: 11 sept 2026 · CWE-88

EPSS · 30d

1.8%EPSS · 30 días6.4%

2026-09-252026-10-23

Ficha del catálogo KEV

Producto

MikroTik / RouterOS

Vulnerabilidad

MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability

Añadido a KEV

10 sept 2026

Remediar antes de

13 sept 2026

Uso conocido en ransomware

Descripción resumida

MikroTik RouterOS contains an improper neutralization of argument delimiters in a command vulnerability which allows an attacker to change the trusted RouterOS policy mask, leading to privilege escalation.

Acción requerida

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-2026-86060

Descripción técnica

RouterOS contains an argument-handling flaw in the SSH login path involving usernames that begin with a prohibited character, allowing for the trusted RouterOS policy mask to be changed, leading to privilege escalation. Exploitation requires an unauthenticated SSH session to reach the RouterOS login helper.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)

Referencias oficiales

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