Skip to content
VulniPulse
Sign in
Advisory severityMedium6.9MikroTik Exploited CISA KEV

Medium [CVE-2026-67279] SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS

This medium-severity MikroTik advisory covers CVE-2026-67279 affecting MikroTik RouterOS.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-67279 Source published Source updated

VulniPulse record published

CVE-2026-67279
Affected products & platforms
MikroTikRouterOS
Open source advisory

Android app · Google Play

Monitor future MikroTik CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery
Get CVE alertsSee app features

Summary

MikroTik has found a security vulnerability in RouterOS and releases containing a fix have been published in all channels. This is an important security update.

Most configurations are not at risk, but upgrading is highly recommended. Update 2026-10-06: this article now lists all six issues from the original report, including a corrected fix version for one of them (see below).

The CVE numbers were initially withheld to give users time to upgrade. Your device should already give you the option to upgrade software in the “Check for updates” menu.

Fix is included in: 7.25 beta 3. 7.24.2.

7.23.4. 6.49.21.

Important: the fix for one of the issues (CVE-2026-67278, forged certificates and SSH host keys) in 7.24.2 and 7.23.4 was found to be incomplete. The complete fix is included in 7.24.3 (stable) and 7.23.6 (long-term).

If you already upgraded in September, please upgrade again to one of these versions or any later release. RouterOS 6 is not affected by this particular issue.

For regular home device users the issue does not pose an immediate risk, but we still suggest all users to upgrade.

Affected product named by the advisory: MikroTik RouterOS.

CISA Known Exploited Vulnerability

Listed:
Sep 25, 2026 · federal remediation due Sep 28, 2026
Required action:
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.

KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.

Affected versions
  • RouterOS 7.24 before 7.24.2
  • RouterOS 7.0.0 before 7.23.4
  • RouterOS 6.0.0 before 6.49.21

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Fixed versions
  • 7.24.2
  • 7.23.4
  • 6.49.21

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Mitigation

Upgrade to a fixed release: 7.24.2, 7.23.4, 6.49.21. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.