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6.7

Malicious User Can Escalate Privileges on Wi-Fi AP Driver

CVE-2025-20739 · published 1 year ago
Summary

A flaw in the Wi-Fi AP driver code allows a malicious user to gain more access to the system than they should have. This can happen without the user needing to interact with the system. To fix this, update the Wi-Fi AP driver with the latest patch.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
mediatek software_development_kit <= 7.6.7.2
cpe:2.3:a:mediatek:software_development_kit:*:*:*:*:*:*:*:*
openwrt openwrt 19.07.0
21.02.0
cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:*
Original advisory text
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 pr...
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.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
6.7 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
Timeline
Published4 Nov 2025
Updated26 Oct 2026
First seen7 Mar 2026
Sources
CVE-2025-20739 · NVD
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