Answer in brief
CVE-2026-67279 records a Medium severity (CVSS 6.9) vulnerability in SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS. The current sources mark it as known exploited. The current feed maps Mikrotik/RouterOS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.9. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Mikrotik/RouterOS (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Mikrotik/RouterOSgeneric | >=7.24 <7.24.2 || >=7.0.0 <7.23.4 || >=6.0.0 <6.49.21 | 7.24.2, 7.23.4, 6.49.21 |
Published upstream
Sep 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 5, 2026
Added to CISA KEV
Sep 25, 2026
Evidence: source:kev:kev:kev:recordRouterOS 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)
Quoted source text, attributed separately from HOL analysis.