Out of Bounds Write Vulnerability in Mediatek WLAN AP Driver
CVE-2025-20709

8.8HIGH

Key Information:

Vendor

MediaTek
Status
Mt6890, Mt7915, Mt7916, Mt7981, Mt7986
Vendor
CVE Published:
14 October 2025

What is CVE-2025-20709?

The Mediatek WLAN AP driver suffers from an out of bounds write vulnerability caused by improper bounds checking. This weakness may allow an attacker to exploit the issue remotely, resulting in escalation of privileges without requiring any user interaction. The vulnerability's exploitation could grant unauthorized access and control within affected networking environments. It is crucial for users and administrators to apply the recommended patch (WCNCR00415809) to mitigate these security risks.

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Affected Version(s)

MT6890, MT7915, MT7916, MT7981, MT7986 SDK release 7.6.7.2 and before / OpenWrt 19.07, 21.02 (MT6890)

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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