{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20557", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "state": "PUBLISHED", "assignerShortName": "MediaTek", "dateReserved": "2025-11-03T01:30:59.043Z", "datePublished": "2026-11-02T02:33:18.187Z", "dateUpdated": "2026-11-02T02:33:18.187Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-11-02T02:33:18.187Z"}, "descriptions": [{"lang": "en", "value": "In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01877236; Issue ID: MSV-9804."}], "affected": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "defaultStatus": "unaffected", "versions": [{"version": "MT2716", "status": "affected"}, {"version": "MT6813", "status": "affected"}, {"version": "MT6815", "status": "affected"}, {"version": "MT6835", "status": "affected"}, {"version": "MT6858", "status": "affected"}, {"version": "MT6878", "status": "affected"}, {"version": "MT6881", "status": "affected"}, {"version": "MT6897", "status": "affected"}, {"version": "MT6899", "status": "affected"}, {"version": "MT6982", "status": "affected"}, {"version": "MT6986", "status": "affected"}, {"version": "MT6988", "status": "affected"}, {"version": "MT6991", "status": "affected"}, {"version": "MT6993", "status": "affected"}, {"version": "MT8668", "status": "affected"}, {"version": "MT8676", "status": "affected"}, {"version": "MT8678", "status": "affected"}, {"version": "MT8755", "status": "affected"}, {"version": "MT8775", "status": "affected"}, {"version": "MT8792", "status": "affected"}, {"version": "MT8793", "status": "affected"}, {"version": "MT8863", "status": "affected"}, {"version": "MT8873", "status": "affected"}, {"version": "MT8875", "status": "affected"}, {"version": "MT8883", "status": "affected"}]}], "references": [{"url": "https://www.mediatek.com/product-security-bulletin/November-2026"}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "MediaTek chipset", "vendor": "MediaTek, Inc.", "versions": [{"status": "affected", "version": "MT2716"}, {"status": "affected", "version": "MT6813"}, {"status": "affected", "version": "MT6815"}, {"status": "affected", "version": "MT6835"}, {"status": "affected", "version": "MT6858"}, {"status": "affected", "version": "MT6878"}, {"status": "affected", "version": "MT6881"}, {"status": "affected", "version": "MT6897"}, {"status": "affected", "version": "MT6899"}, {"status": "affected", "version": "MT6982"}, {"status": "affected", "version": "MT6986"}, {"status": "affected", "version": "MT6988"}, {"status": "affected", "version": "MT6991"}, {"status": "affected", "version": "MT6993"}, {"status": "affected", "version": "MT8668"}, {"status": "affected", "version": "MT8676"}, {"status": "affected", "version": "MT8678"}, {"status": "affected", "version": "MT8755"}, {"status": "affected", "version": "MT8775"}, {"status": "affected", "version": "MT8792"}, {"status": "affected", "version": "MT8793"}, {"status": "affected", "version": "MT8863"}, {"status": "affected", "version": "MT8873"}, {"status": "affected", "version": "MT8875"}, {"status": "affected", "version": "MT8883"}]}], "source": "security@mediatek.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01877236; Issue ID: MSV-9804."}], "id": "CVE-2026-20557", "lastModified": "2026-11-02T03:17:32.823", "metrics": {}, "published": "2026-11-02T03:17:32.823", "references": [{"source": "security@mediatek.com", "url": "https://www.mediatek.com/product-security-bulletin/November-2026"}], "sourceIdentifier": "security@mediatek.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "security@mediatek.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT2716"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6813"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6815"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6835"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6858"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6878"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6881"}}, {"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": "MT6982"}}, 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"value": "MT6815"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6835"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6858"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6878"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6881"}}, {"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": "MT6982"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6986"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6988"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "MT6991"}}, {"platform": null, 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