CVE-2025-20739 — Stack-based Buffer Overflow in Software Development KIT

CWE-121 — Stack-based Buffer OverflowCWE-787 — Out-of-bounds Write3 documents3 sources
Severity
6.7MEDIUMNVD
EPSS
0.0%
top 95.41%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mediatek Software Development KITOpenwrt
Timeline
PublishedNov 4

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 if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: WCNCR00435340; Issue ID: MSV-4038.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HExploitability: 0.8 | Impact: 5.9

Affected Packages2 packages

▶NVDopenwrt/openwrt19.07.0, 21.02.0+1

🔴Vulnerability Details

2
CVEList
CVE-2025-20739: In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check↗2025-11-04
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GHSA
GHSA-8rfm-grwq-grhj: In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check↗2025-11-04
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CVE-2025-20739 — Stack-based Buffer Overflow | cvebase