CVE-2026-56719
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
RouterOS
PublishedSep 16, 2026
First seenSep 16, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| MikroTik RouterOS | v ≤ 6.49.18, 7.0.0 ≤ v ≤ 7.11.2 | — |
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