CVE-2026-56719
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.
- Published Sep 16, 2026
- CVSS 6.3 medium
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available