SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS
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)
CVE-2026-67279
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-67279
RouterOS
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Mikrotik",
"product": "RouterOS",
"versions": [
{
"status": "affected",
"version": "7.24",
"lessThan": "7.24.2",
"versionType": "custom"
},
{
"status": "affected",
"version": "7.0.0",
"lessThan": "7.23.4",
"versionType": "custom"
},
{
"status": "affected",
"version": "6.0.0",
"lessThan": "6.49.21",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-67279
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #2347 · Revision 1
- Added to Heist Feed
- Publisher date