CVE-2026-20493

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-20493
StatePUBLISHED
AssignerMediaTek
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-03 03:16:44 UTC
Updated2026-08-19 15:08:40 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from ADP

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.001000000 probability, percentile 0.009640000 (date 2026-08-19)

Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED4.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Mediatek Mt6890 - All All All
Operating System Mediatek Mt6890 Firmware - All All All
Hardware Mediatek Mt6988 - All All All
Operating System Mediatek Mt6988 Firmware - All All All
Hardware Mediatek Mt6990 - All All All
Operating System Mediatek Mt6990 Firmware - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA MediaTek Inc. MediaTek Chipset affected MT6890 Not specified
CNA MediaTek Inc. MediaTek Chipset affected MT6988 Not specified
CNA MediaTek Inc. MediaTek Chipset affected MT6990 Not specified

References

ReferenceSourceLinkTags
www.mediatek.com/product-security-bulletin/August-2026 [email protected] www.mediatek.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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