CVE-2026-20493

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 v3 4.4 MEDIUM

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.mediatek.com/product-security-bulletin/August-2026	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:mediatek:mt6890_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6890:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:mediatek:mt6988_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6988:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:mediatek:mt6990_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6990:-:*:*:*:*:*:*:*

History

23 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) En Wi-Fi, existe una posible escritura fuera de límites debido a una comprobación de límites faltante. Esto podría conducir a una denegación de servicio local si un actor malicioso ya ha obtenido el privilegio de Sistema. No se necesita interacción del usuario para la explotación. ID del parche: BORA00154903; ID del problema: MSV-7575.

Information

Published : 2026-08-03 03:16

Updated : 2026-10-23 22:10

NVD link : CVE-2026-20493

Mitre link : CVE-2026-20493

CVE.ORG link : CVE-2026-20493

JSON object : View

Products Affected

mediatek

mt6890_firmware
mt6990_firmware
mt6990
mt6890
mt6988
mt6988_firmware

CWE

CWE-787

Out-of-bounds Write

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