Skip to content
OpenAdvisories
Medium · 6.5 CVE-2026-56719 EUVD-2026-80701GHSA-w9p3-2qvw-6779

MikroTik RouterOS < 7.24 Out-of-Bounds Read via SMB1 SessionSetupAndX

Published Sep 16, 2026 · Updated Oct 1, 2026 · Assigned by VulnCheck

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

VendorProductAffectedFixed
MikroTik RouterOS ≤ 6.49.18, 7.0.0 – ≤ 7.11.2 7.24.0

Advisories 1

References