CVE-2026-20528

{"id": "CVE-2026-20528", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20528", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-05T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.8}]}, "affected": [{"source": "security@mediatek.com", "affectedData": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "versions": [{"status": "affected", "version": "MT2735"}, {"status": "affected", "version": "MT2737"}, {"status": "affected", "version": "MT6813"}, {"status": "affected", "version": "MT6880"}, {"status": "affected", "version": "MT6890"}, {"status": "affected", "version": "MT6980D"}, {"status": "affected", "version": "MT6986"}, {"status": "affected", "version": "MT6986D"}, {"status": "affected", "version": "MT6988"}, {"status": "affected", "version": "MT6990"}], "defaultStatus": "unaffected"}]}], "published": "2026-10-05T02:16:51.520", "references": [{"url": "https://www.mediatek.com/product-security-bulletin/October-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 write and read due to a missing bounds check. This could lead to local information disclosure, memory corruption, crashes, or privilege escalation if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: ALPS11428950 (Note: For MT6880, MT6890) / ALPS10563453 (Note: For MT6980D, MT6990, MT6986, MT6986D, MT6813, MT6988) / AUTO00858766 (Note: For MT2735, MT2737); Issue ID: MSV-9893."}], "lastModified": "2026-10-09T15:03:38.953", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt2735_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A0D40745-FA7E-40DF-BCA6-24CECBB0AE43"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt2735:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "7F1D09FC-5BE9-4B23-82F1-3C6EAC5711A6"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt2737_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "85F4E58C-A9BC-4116-A844-B94C6B6566FA"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt2737:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "9C2A1118-B5F7-4EF5-B329-0887B5F3430E"}], "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:mt6880_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1A5C1637-BAC7-47C0-AD84-B0404083A857"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6880:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "68CF4A7A-3136-4C4C-A795-81323896BE11"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6890_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BB9AC17B-5ED8-4B58-A7A0-B146DD1DD244"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6890:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "171D1C08-F055-44C0-913C-AA2B73AF5B72"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6980d_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "63E39158-4501-494C-B989-4572AB72E970"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6980d:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "2758122C-4D11-4D34-9B72-3905F3A28448"}], "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"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6986d_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "49A0D3BF-5423-4204-A167-A43489C056F8"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6986d:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "68AA1CF7-F1CB-44A0-980E-DB32D9E379B9"}], "operator": "OR"}], "operator": "AND"}, {"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:mt6990_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7273471C-6471-43C7-82DE-8551CFC9C39A"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6990:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1A76806D-A4E3-466A-90CB-E9FFE478E7A0"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@mediatek.com"}