CVE-2026-20493

Analyzed Analyzed - Analysis Complete

Out of Bounds Write in MediaTek Wi-Fi Driver

Publication date: 2026-08-03

Last updated on: 2026-08-19

Assigner: MediaTek, Inc.

Description

In wifi, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: BORA00154903; Issue ID: MSV-7575.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-03

Last Modified

2026-08-19

Generated

2026-08-24

AI Q&A

2026-08-03

EPSS Evaluated

2026-08-22

NVD

CVE-2026-20493

EUVD

EUVD-2026-52083

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt6890_firmware	*
mediatek	mt6988_firmware	*
mediatek	mt6990_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is a vulnerability in MediaTek's WiFi component where a missing bounds check could allow an out-of-bounds write. This flaw could be exploited by a malicious actor with System privilege to cause a local denial of service. No user interaction is required for exploitation.

Detection Guidance

Detection requires checking for the specific patch or issue ID mentioned in the CVE. Use system logs to verify if the patch BORA00154903 or issue MSV-7575 has been applied. No direct commands are provided in the CVE details.

Impact Analysis

If exploited, this vulnerability could lead to a denial of service on your device. Since it requires System privilege, an attacker would need prior access to your system to trigger this issue.

Compliance Impact

This vulnerability does not directly impact compliance with GDPR, HIPAA, or similar standards as it is a local denial of service issue requiring System privilege access. No evidence suggests it affects data confidentiality, integrity, or privacy required by these regulations.

Mitigation Strategies

Apply the patch with ID BORA00154903 provided by MediaTek to address the missing bounds check in the wifi component. Ensure the System privilege is properly secured to prevent local denial of service.

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