CVE-2026-20476

In ccci, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981532; Issue ID: MSV-7660.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

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:mt6988_firmware:-:*:*:*:*:*:*:*

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

Configuration 2 (hide)

AND

cpe:2.3:o:mediatek:mt6813_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6813:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:mediatek:mt6986_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6986:-:*:*:*:*:*:*:*

History

23 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) En ccci, existe una posible lectura fuera de límites debido a una comprobación de límites faltante. Esto podría llevar a una denegación de servicio local con privilegios de ejecución de usuario necesarios. No se necesita interacción del usuario para la explotación. ID del parche: ALPS10981532; ID del problema: MSV-7660.

Information

Published : 2026-08-03 03:16

Updated : 2026-10-23 22:10

NVD link : CVE-2026-20476

Mitre link : CVE-2026-20476

CVE.ORG link : CVE-2026-20476

JSON object : View

Products Affected

mediatek

mt6813_firmware
mt6986
mt6986_firmware
mt6813
mt6988
mt6988_firmware

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2026-20476", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20476", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-03T19:07:07.424109Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security@mediatek.com", "affectedData": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "versions": [{"status": "affected", "version": "MT6813"}, {"status": "affected", "version": "MT6986"}, {"status": "affected", "version": "MT6988"}], "defaultStatus": "unaffected"}]}], "published": "2026-08-03T03:16:42.637", "references": [{"url": "https://www.mediatek.com/product-security-bulletin/August-2026", "tags": ["Vendor Advisory"], "source": "security@mediatek.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@mediatek.com", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In ccci, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981532; Issue ID: MSV-7660."}, {"lang": "es", "value": "En ccci, existe una posible lectura fuera de l\u00edmites debido a una comprobaci\u00f3n de l\u00edmites faltante. Esto podr\u00eda llevar a una denegaci\u00f3n de servicio local con privilegios de ejecuci\u00f3n de usuario necesarios. No se necesita interacci\u00f3n del usuario para la explotaci\u00f3n. ID del parche: ALPS10981532; ID del problema: MSV-7660."}], "lastModified": "2026-10-23T22:10:00.160", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6988_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8680C37E-850E-4302-A6B6-F78DCAC7A905"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6988:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "ADB95144-97C3-4329-99DB-CB1B6FBB8A2D"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6813_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0E1CB25C-4643-4239-AE47-B5AE876416ED"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6813:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "66F9EAE4-F1D7-46DB-AA2A-0290F6EF0501"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6986_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17581EC0-D68B-4EA3-845C-366C4A65FC6B"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6986:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1F419FE2-2D6D-48EE-9B6C-E88AC5D44186"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@mediatek.com"}