Out of Bounds Write Vulnerability in MediaTek WLAN AP Driver
CVE-2025-20748

6.7MEDIUM

Key Information:

Vendor

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

What is CVE-2025-20748?

The vulnerability in the WLAN AP driver of MediaTek products exposes users to the risk of local privilege escalation due to a flawed bounds check. When exploited, this flaw allows an attacker with system-level access to write to memory locations outside the intended boundaries, potentially compromising system integrity without requiring user interaction. A fix has been initiated, and users are advised to apply the patch to mitigate risks. Continuous monitoring and updates are crucial to maintaining security.

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
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CVE-2025-20748 : Out of Bounds Write Vulnerability in MediaTek WLAN AP Driver