MikroTik RouterOS < 7.24 Heap Corruption via SMB1 SessionSetupAndX
Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.
cve-program · CVE-2026-89028
PublishedMikroTik 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.
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CVE-2026-89028 · CVE overview and exploitation status
cve-program · CVE-2026-89028
This historical advisory does not include today's related changes. Open the latest advisory to find current connections.