Description
MikroTik RouterOS before 7.24 contains an out-of-bounds read vulnerability in the userspace SMB daemon that allows unauthenticated attackers to read beyond the end of the request buffer by supplying a crafted uniPwdLen field value in a minimal SMB1 SessionSetupAndX frame. The out-of-bounds read occurs in the SessionSetupAndX handler before any credential validation, potentially exposing sensitive memory contents.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MikroTik | RouterOS | ≤ 6.49.18, 7.0.0 – ≤ 7.11.2 | 7.24.0 |
Advisories 1
- WID-SEC-2026-3436 MikroTik RouterOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 16, 2026
References
- Release Notes vendor-advisory patch
- https://www.vulncheck.com/advisories/mikrotik-routeros-out-of-bounds-read-via-smb1-sessionsetupandx third-party-advisory