- Medium 6.9
- Known exploited (CISA KEV)
CVE-2026-67279
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)
Scores
The facts
- Published
- 5 September 2026
- Last changed
- 26 September 2026
- NVD status
- Analyzed
- Severity
- Medium, CVSS 6.9 out of 10 (version 4.0)
CVSS: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… - Weakness
- Affects
- mikrotik routeros
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 25 September 2026.
- EPSS
- 1.0% chance of exploitation activity in the next 30 days (percentile 63).
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