Out of Bounds Write Vulnerability in MediaTek WLAN AP Driver
CVE-2025-20738

6.7MEDIUM

Key Information:

Vendor

MediaTek
Status
Mt6890, Mt7615, Mt7622, Mt7663, Mt7915, Mt7916, Mt7981, Mt7986
Vendor
CVE Published:
4 November 2025

What is CVE-2025-20738?

The MediaTek WLAN AP driver is susceptible to an out of bounds write vulnerability caused by insufficient bounds checking. This flaw can permit a local attacker, who has already gained system privileges, to escalate their privileges further without requiring user interaction. Addressing this vulnerability is critical to maintaining the integrity and security of systems utilizing affected versions of the driver.

Affected Version(s)

MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986 SDK release 7.6.7.2 and before / openWRT 19.07, 21.02

References

https://corp.mediatek.com/product-security-bulletin/Novem...

CVSS V3.1

Score:
6.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.
CVE-2025-20738 : Out of Bounds Write Vulnerability in MediaTek WLAN AP Driver