CVE-2026-20491

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-20491
StatePUBLISHED
AssignerMediaTek
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-03 03:16:44 UTC
Updated2026-08-19 15:08:11 UTC
DescriptionIn med, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981478 (Note: For MT6890, MT6990, MT6988) / AUTO00851173 (Note: For MT2735, MT2737); Issue ID: MSV-7652.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from ADP

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

EPSS: 0.001020000 probability, percentile 0.010800000 (date 2026-08-19)

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

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Mediatek Mt2735 - All All All
Operating System Mediatek Mt2735 Firmware - All All All
Hardware Mediatek Mt2737 - All All All
Operating System Mediatek Mt2737 Firmware - All All All
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 MT2735 Not specified
CNA MediaTek Inc. MediaTek Chipset affected MT2737 Not specified
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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