CVE-2025-20631
Published: 03 February 2025
Summary
CVE-2025-20631 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Mediatek Software Development Kit. Its CVSS base score is 7.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 24.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Requires identification, reporting, and correction of system flaws like the out-of-bounds write in the wlan AP driver via timely patching (WCNCR00397141).
Implements memory protection mechanisms to prevent exploitation of out-of-bounds writes through unauthorized memory access, modification, or execution.
Mandates validation of information inputs to the system, directly addressing the incorrect bounds check that enables the buffer overflow in the wlan AP driver.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local OOB write in wlan driver directly enables privilege escalation via exploitation of a software vulnerability (CWE-787) from low to high privileges with arbitrary code execution.
NVD Description
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 no additional execution privileges needed. User interaction is not needed for exploitation. Patch…
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ID: WCNCR00397141; Issue ID: MSV-2187.
Deeper analysisAI
CVE-2025-20631 is a vulnerability in the wlan AP driver that enables an out-of-bounds write due to an incorrect bounds check, corresponding to CWE-787. This issue affects MediaTek's wireless access point driver components, as detailed in their product security bulletin. The vulnerability has a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity with local access required but low complexity and no user interaction needed.
A local attacker with low privileges (PR:L) can exploit this vulnerability to achieve escalation of privilege without requiring additional execution privileges. Successful exploitation allows arbitrary code execution with elevated privileges, potentially compromising confidentiality, integrity, and availability of the affected system to a high degree.
MediaTek's February 2025 product security bulletin provides mitigation details, including Patch ID WCNCR00397141 and Issue ID MSV-2187. Security practitioners should apply the specified patch to vulnerable wlan AP driver instances to remediate the out-of-bounds write risk.
Details
- CWE(s)