Out of Bounds Write Vulnerability in MediaTek WLAN AP Firmware
CVE-2026-20430

8.8HIGH

Key Information:

Vendor

MediaTek
Status
Mediatek Chipset
Vendor
CVE Published:
2 March 2026

What is CVE-2026-20430?

An out of bounds write vulnerability has been identified in the firmware of MediaTek WLAN access points. This issue arises from an incorrect bounds check, allowing a remote attacker (proximal or adjacent) to escalate privileges without requiring any additional execution rights. The vulnerability does not necessitate user interaction, which increases the risk of exploitation. MediaTek has provided a patch (ID: WCNCR00467553) to address this issue, and it is crucial for users to update their devices to safeguard against potential threats.

Affected Version(s)

MediaTek chipset MT6890

MediaTek chipset MT7915

MediaTek chipset MT7916

References

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

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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