Out of Bounds Write Vulnerability in MediaTek WLAN AP Driver
CVE-2025-20734

5.3MEDIUM

Key Information:

Vendor

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

What is CVE-2025-20734?

The WLAN AP Driver from MediaTek features a vulnerability that allows for an out of bounds write due to improper bounds checking. This flaw could enable a malicious individual who has already secured system privileges to escalate their access. Notably, no user interaction is required for this exploit to be carried out. It is essential for users of affected versions to apply the relevant patch, WCNCR00441507, to mitigate the potential security risk.

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:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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