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Openwrt CVE-2025-20733

HIGH
Heap-based Buffer Overflow (CWE-122)
2025-11-04 security@mediatek.com
Privilege Escalation Buffer Overflow Heap Overflow Openwrt Software Development Kit
7.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 28, 2026 - 19:20 vuln.today
CVE Published
Nov 04, 2025 - 07:15 nvd
HIGH 7.8

DescriptionNVD

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00441509; Issue ID: MSV-4138.

AnalysisAI

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-122. In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00441509; Issue ID: MSV-4138. Affected products include: Mediatek Software Development Kit, Openwrt.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2025-20733 vulnerability details – vuln.today
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