CVE intelligenceCISA KEV

CVE-2026-86060

MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability

Published Sep 5, 2026Sources checked Oct 3, 2026

9.8CRITICALCVSS out of 10

What this means

Actively exploited

CISA lists CVE-2026-86060 in its Known Exploited Vulnerabilities catalog, which means exploitation has been observed. The entry applies to MikroTik RouterOS.

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.

Public exploit: Cataloged public exploit.

Exploit-DB: MikroTrick_ 7.24_ 7.24.2_ 7.0.0_ 7.23.4_ 6.0.0_ 6.49.21 - RCE (2026-10-01 04:26:08.144321+00)

CISA KEVListedObserved exploitation

EPSS6.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors1Source-linked actor relationships

Overview

What is CVE-2026-86060?

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)