CVE-2026-67279

Aliases:openSUSE-SU-2026:11737-1
Analyzed
Published: 05 Sept 2026, 20:00
Last modified:25 Sept 2026, 15:41

Vulnerability Summary

Overall Risk (default)
medium
38/100
CVSS Score
6.9 MEDIUM
v4.0 (cve.org)
EPSS Score
0.71% LOW
1% probability 0.00%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

05 Sept 2026, 20:00
Published
Vulnerability first disclosed
25 Sept 2026, 00:00
Added to CISA KEV
Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
25 Sept 2026, 15:41
Last Modified
Vulnerability information updated
28 Sept 2026, 00:00
CISA Remediation Due
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.

Description

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)

CVSS Metrics

  • v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  • v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Trends

Current EPSS score: 0.71%• Percentile: 52%

Techniques & Countermeasures

  • CWE-841•Improper Enforcement of Behavioral Workflow

    The product supports a session in which more than one behavior must be performed by an actor, but it does not properly ensure that the actor performs the behaviors in the required sequence.

Affected Systems

  • mikrotik•routeros

    ≥ 7.0.0, < 7.23.4 | ≥ 6.0.0, < 6.49.21 | ≥ 6.0, < 6.49.21 | ≥ 7.0, < 7.23.4 | ≥ 7.24, < 7.24.2

  • opensuse•sshamble&distro=openSUSE Tumbleweed

    < 0.3.12-1.1

References (10)