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.
Metrics
Affected Vendors & Products
References
History
Thu, 01 Oct 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:* |
Thu, 17 Sep 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Thu, 17 Sep 2026 03:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mikrotik
Mikrotik routeros |
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| Vendors & Products |
Mikrotik
Mikrotik routeros |
Wed, 16 Sep 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | MikroTik RouterOS < 7.24 Heap Corruption via SMB1 SessionSetupAndX | |
| Weaknesses | CWE-122 CWE-191 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-09-16T13:12:02.672Z
Updated: 2026-10-01T15:21:51.527Z
Reserved: 2026-09-10T16:23:54.472Z
Link: CVE-2026-89028
Updated: 2026-09-17T19:16:38.246Z
Status : Awaiting Analysis
Published: 2026-09-16T14:17:12.887
Modified: 2026-09-24T21:04:40.340
Link: CVE-2026-89028
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