Out of Bounds Write Vulnerability in MediaTek Wi-Fi Products
CVE-2026-20493

4.4MEDIUM

Key Information:

Vendor

MediaTek
Status
Mediatek Chipset
Vendor
CVE Published:
3 August 2026

What is CVE-2026-20493?

MediaTek Wi-Fi products contain a vulnerability that allows for an out of bounds write, potentially resulting in a local denial of service. This issue arises from a missing bounds check within the code, which could be exploited by a malicious actor who has already gained system privileges. No user interaction is needed for successful exploitation, posing a significant risk. A patch is available under Patch ID: BORA00154903 addressing this issue.

Affected Version(s)

MediaTek chipset MT6890

MediaTek chipset MT6988

MediaTek chipset MT6990

References

https://www.mediatek.com/product-security-bulletin/August...

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.