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VULNERABILITIES

CVE-2026-86060 Details

Description

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)

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-86060 CISA-ADPUS Government Resource
https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve [email protected]Third Party Advisory
https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/ [email protected]MitigationThird Party Advisory
https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802 [email protected]Release Notes
https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801 [email protected]Release Notes

see all 8 references

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command VulnerabilitySep 10, 2026Sep 13, 2026Apply 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.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')[email protected]

Affected Products

ProductVersions
mikrotik routeros
>= 6.0, < 6.49.21
>= 7.0, < 7.23.4
>= 7.24, < 7.24.2

CPE

  • cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-86060
NVD Published Date:
Sep 5, 2026
NVD Last Modified:
Sep 11, 2026
Source:
[email protected]
CVE-2026-86060 Details - Not Deferred