CVE-2026-89028

7.5 HIGH

Published 2026-09-16 · Updated 2026-09-17

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

MikroTik RouterOS before 7.24 contains a heap memory corruption vulnerability in the userspace SMB daemon that allows remote attackers to corrupt adjacent heap memory by supplying a crafted uniPwdLen value in the SMB1 SessionSetupAndX handler. An attacker can send a malformed SMB1 request with a uniPwdLen field that triggers an integer underflow, causing the resulting value to be used as the copy length in a memory copy operation into a smaller heap buffer, corrupting adjacent heap memory.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-122, CWE-191

References

https://forum.mikrotik.com/t/7-24-stable-is-released/272381
https://www.vulncheck.com/advisories/mikrotik-routeros-heap-corruption-via-smb1-sessionsetupandx

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.