{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20521", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "state": "PUBLISHED", "assignerShortName": "MediaTek", "dateReserved": "2025-11-03T01:30:59.032Z", "datePublished": "2026-10-05T01:39:48.809Z", "dateUpdated": "2026-10-05T01:39:48.809Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-10-05T01:39:48.809Z"}, "descriptions": [{"lang": "en", "value": "In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571."}], "affected": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "defaultStatus": "unaffected", "versions": [{"version": "MT2718", "status": "affected"}, {"version": "MT6768", "status": "affected"}, {"version": "MT6769", "status": "affected"}, {"version": "MT6781", "status": "affected"}, {"version": "MT6789", "status": "affected"}, {"version": "MT6833", "status": "affected"}, {"version": "MT6835", "status": "affected"}, {"version": "MT6853", "status": "affected"}, {"version": "MT6855", "status": "affected"}, {"version": "MT6858", "status": "affected"}, {"version": "MT6877", "status": "affected"}, {"version": "MT6878", "status": "affected"}, {"version": "MT6879", "status": "affected"}, {"version": "MT6881", "status": "affected"}, {"version": "MT6883", "status": "affected"}, {"version": "MT6885", "status": "affected"}, {"version": "MT6886", "status": "affected"}, {"version": "MT6889", "status": "affected"}, {"version": "MT6893", "status": "affected"}, {"version": "MT6895", "status": "affected"}, {"version": "MT6897", "status": "affected"}, {"version": "MT6899", "status": "affected"}, {"version": "MT6983", "status": "affected"}, {"version": "MT6985", "status": "affected"}, {"version": "MT6989", "status": "affected"}, {"version": "MT6991", "status": "affected"}, {"version": "MT6993", "status": "affected"}, {"version": "MT8126", "status": "affected"}, {"version": "MT8171", "status": "affected"}, {"version": "MT8186", "status": "affected"}, {"version": "MT8188", "status": "affected"}, {"version": "MT8189", "status": "affected"}, {"version": "MT8195", "status": "affected"}, {"version": "MT8196", "status": "affected"}, {"version": "MT8367", "status": "affected"}, {"version": "MT8391", "status": "affected"}, {"version": "MT8395", "status": "affected"}, {"version": "MT8668", "status": "affected"}, {"version": "MT8676", "status": "affected"}, {"version": "MT8678", "status": "affected"}, {"version": "MT8695", "status": "affected"}, {"version": "MT8696", "status": "affected"}, {"version": "MT8781", "status": "affected"}, {"version": "MT8788E", "status": "affected"}, {"version": "MT8792", "status": "affected"}, {"version": "MT8793", "status": "affected"}, {"version": "MT8799", "status": "affected"}, {"version": "MT8910", "status": "affected"}]}], "references": [{"url": "https://www.mediatek.com/product-security-bulletin/October-2026"}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-121", "description": "CWE-121 Stack-based Buffer Overflow"}]}], "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "MediaTek chipset", "vendor": "MediaTek, Inc.", "versions": [{"status": "affected", "version": "MT2718"}, {"status": "affected", "version": "MT6768"}, {"status": "affected", "version": "MT6769"}, {"status": "affected", "version": "MT6781"}, {"status": "affected", "version": "MT6789"}, {"status": "affected", "version": "MT6833"}, {"status": "affected", "version": "MT6835"}, {"status": "affected", "version": "MT6853"}, {"status": "affected", "version": "MT6855"}, {"status": "affected", "version": "MT6858"}, {"status": "affected", "version": "MT6877"}, {"status": "affected", "version": "MT6878"}, {"status": "affected", "version": "MT6879"}, {"status": "affected", "version": "MT6881"}, {"status": "affected", "version": "MT6883"}, {"status": "affected", "version": "MT6885"}, {"status": "affected", "version": "MT6886"}, {"status": "affected", "version": "MT6889"}, {"status": "affected", "version": "MT6893"}, {"status": "affected", "version": "MT6895"}, {"status": "affected", "version": "MT6897"}, {"status": "affected", "version": "MT6899"}, {"status": "affected", "version": "MT6983"}, {"status": "affected", "version": "MT6985"}, {"status": "affected", "version": "MT6989"}, {"status": "affected", "version": "MT6991"}, {"status": "affected", "version": "MT6993"}, {"status": "affected", "version": "MT8126"}, {"status": "affected", "version": "MT8171"}, {"status": "affected", "version": "MT8186"}, {"status": "affected", "version": "MT8188"}, {"status": "affected", "version": "MT8189"}, {"status": "affected", "version": "MT8195"}, {"status": "affected", "version": "MT8196"}, {"status": "affected", "version": "MT8367"}, {"status": "affected", "version": "MT8391"}, {"status": "affected", "version": "MT8395"}, {"status": "affected", "version": "MT8668"}, {"status": "affected", "version": "MT8676"}, {"status": "affected", "version": "MT8678"}, {"status": "affected", "version": "MT8695"}, {"status": "affected", "version": "MT8696"}, {"status": "affected", "version": "MT8781"}, {"status": "affected", "version": "MT8788E"}, {"status": "affected", "version": "MT8792"}, {"status": "affected", "version": "MT8793"}, {"status": "affected", "version": "MT8799"}, {"status": "affected", "version": "MT8910"}]}], "source": "security@mediatek.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571."}], "id": "CVE-2026-20521", "lastModified": "2026-10-05T02:16:50.660", "metrics": {}, "published": "2026-10-05T02:16:50.660", "references": [{"source": "security@mediatek.com", "url": "https://www.mediatek.com/product-security-bulletin/October-2026"}], "sourceIdentifier": "security@mediatek.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "security@mediatek.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT2718"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6768"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6769"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6781"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6789"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6833"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6835"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6853"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6855"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6858"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6877"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6878"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6879"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6881"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6883"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6885"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6886"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6889"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6893"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6895"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6897"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6899"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6983"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6985"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6989"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6991"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6993"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8126"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8171"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8186"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8188"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8189"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8195"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8196"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8367"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8391"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8395"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8668"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8676"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8678"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8695"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8696"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8781"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8788E"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8792"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8793"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8799"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT8910"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "MediaTek chipset", "source": "cna", "vendor": "MediaTek, Inc."}, "product": "mediatek_chipset", "vendor": "mediatek,_inc."}], "created": "2026-10-05T04:30:04.008964+00:00", "title": "Video HAL missing bounds check leads to local privilege escalation in MediaTek chipset", "updated": "2026-10-05T06:45:08.754643+00:00", "vendors": ["mediatek,_inc.", "mediatek,_inc.$PRODUCT$mediatek_chipset"]}