{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20477", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "state": "PUBLISHED", "assignerShortName": "MediaTek", "dateReserved": "2025-11-03T01:30:59.016Z", "datePublished": "2026-08-03T02:05:32.767Z", "dateUpdated": "2026-08-05T03:56:48.796Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-08-03T02:05:32.767Z"}, "descriptions": [{"lang": "en", "value": "In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11009963; Issue ID: MSV-7658."}], "affected": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "defaultStatus": "unaffected", "versions": [{"version": "MT6991", "status": "affected"}, {"version": "MT6993", "status": "affected"}, {"version": "MT8188", "status": "affected"}, {"version": "MT8189", "status": "affected"}, {"version": "MT8668", "status": "affected"}, {"version": "MT8676", "status": "affected"}, {"version": "MT8678", "status": "affected"}, {"version": "MT8781", "status": "affected"}, {"version": "MT8799", "status": "affected"}, {"version": "MT8910", "status": "affected"}]}], "references": [{"url": "https://www.mediatek.com/product-security-bulletin/August-2026"}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-08-04T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-20477"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-05T03:56:48.796Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-20477", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-03T19:08:46.098148Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-03T19:08:40.860Z"}}], "cna": {"affected": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "versions": [{"status": "affected", "version": "MT6991"}, {"status": "affected", "version": "MT6993"}, {"status": "affected", "version": "MT8188"}, {"status": "affected", "version": "MT8189"}, {"status": "affected", "version": "MT8668"}, {"status": "affected", "version": "MT8676"}, {"status": "affected", "version": "MT8678"}, {"status": "affected", "version": "MT8781"}, {"status": "affected", "version": "MT8799"}, {"status": "affected", "version": "MT8910"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://www.mediatek.com/product-security-bulletin/August-2026"}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11009963; Issue ID: MSV-7658."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-08-03T02:05:32.767Z"}}}, "cveMetadata": {"cveId": "CVE-2026-20477", "state": "PUBLISHED", "dateUpdated": "2026-08-05T03:56:48.796Z", "dateReserved": "2025-11-03T01:30:59.016Z", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "datePublished": "2026-08-03T02:05:32.767Z", "assignerShortName": "MediaTek"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "MediaTek chipset", "vendor": "MediaTek, Inc.", "versions": [{"status": "affected", "version": "MT6991"}, {"status": "affected", "version": "MT6993"}, {"status": "affected", "version": "MT8188"}, {"status": "affected", "version": "MT8189"}, {"status": "affected", "version": "MT8668"}, {"status": "affected", "version": "MT8676"}, {"status": "affected", "version": "MT8678"}, {"status": "affected", "version": "MT8781"}, {"status": "affected", "version": "MT8799"}, {"status": "affected", "version": "MT8910"}]}], "source": "security@mediatek.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8910_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "A05E635E-9559-4899-A7BA-A74EB6501D1C", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8910:-:*:*:*:*:*:*:*", "matchCriteriaId": "8C81BC81-1358-4005-8D35-92428D052A65", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6991_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "D9DD2119-39E8-4A9C-8E2A-8FB7F92A1001", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6991:-:*:*:*:*:*:*:*", "matchCriteriaId": "CBBB30DF-E963-4940-B742-F6801F68C3FC", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt6993_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "FAEB2240-FF37-4CBE-BBEF-8A8281153646", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt6993:-:*:*:*:*:*:*:*", "matchCriteriaId": "57E92BE0-5E65-4770-8E1A-0E5D07A38164", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8188_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "30E10DDB-6D3D-42CB-9DB9-ED25E6163D3D", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8188:-:*:*:*:*:*:*:*", "matchCriteriaId": "BA3D4A45-38EE-4125-AE67-89D1C707F95A", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8189_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "527C8F57-8492-49BF-BCA9-0D77011D3493", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8189:-:*:*:*:*:*:*:*", "matchCriteriaId": "AE35C440-2C15-42FF-ADD0-D99C0FB7D1C9", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8668_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "3EAACB56-716C-4E17-AB78-F5E68B75B791", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8668:-:*:*:*:*:*:*:*", "matchCriteriaId": "2589C222-3D62-4BDB-98F2-5F1E38600D8D", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8676_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "645D7C99-A0A0-4FB0-97AC-3DA5161A44D9", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8676:-:*:*:*:*:*:*:*", "matchCriteriaId": "EE302F6F-170E-4350-A8F4-65BE0C50CB78", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8678_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "CFEC7A7B-6948-4B8A-BFA1-9F9D07043605", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8678:-:*:*:*:*:*:*:*", "matchCriteriaId": "152A5F3D-8004-4649-BDB1-E6F0798AF1CB", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8781_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "7E2280E5-F903-4541-8404-9F789CEFF172", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8781:-:*:*:*:*:*:*:*", "matchCriteriaId": "533284E5-C3AF-48D3-A287-993099DB2E41", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt8799_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "BB8ADEB7-A1A3-4781-BB65-4D2AF9896F80", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt8799:-:*:*:*:*:*:*:*", "matchCriteriaId": "ACB27F98-6318-44C8-A28D-375A357A03CA", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11009963; Issue ID: MSV-7658."}], "id": "CVE-2026-20477", "lastModified": "2026-08-19T17:31:27.687", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20477", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-04T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-08-03T03:16:42.750", "references": [{"source": "security@mediatek.com", "tags": ["Vendor Advisory"], "url": "https://www.mediatek.com/product-security-bulletin/August-2026"}], "sourceIdentifier": "security@mediatek.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "security@mediatek.com", "type": "Secondary"}]}

{}