{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-20520",
        "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
        "state": "PUBLISHED",
        "assignerShortName": "MediaTek",
        "dateReserved": "2025-11-03T01:30:59.032Z",
        "datePublished": "2026-10-05T01:39:44.583Z",
        "dateUpdated": "2026-10-05T10:32:54.659Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
                "shortName": "MediaTek",
                "dateUpdated": "2026-10-05T01:39:44.583Z"
            },
            "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: MOLY01778988; Issue ID: MSV-8897."
                }
            ],
            "affected": [
                {
                    "vendor": "MediaTek, Inc.",
                    "product": "MediaTek chipset",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "MT2716",
                            "status": "affected"
                        },
                        {
                            "version": "MT2735",
                            "status": "affected"
                        },
                        {
                            "version": "MT2737",
                            "status": "affected"
                        },
                        {
                            "version": "MT6813",
                            "status": "affected"
                        },
                        {
                            "version": "MT6815",
                            "status": "affected"
                        },
                        {
                            "version": "MT6833",
                            "status": "affected"
                        },
                        {
                            "version": "MT6835",
                            "status": "affected"
                        },
                        {
                            "version": "MT6853",
                            "status": "affected"
                        },
                        {
                            "version": "MT6855",
                            "status": "affected"
                        },
                        {
                            "version": "MT6858",
                            "status": "affected"
                        },
                        {
                            "version": "MT6873",
                            "status": "affected"
                        },
                        {
                            "version": "MT6875",
                            "status": "affected"
                        },
                        {
                            "version": "MT6877",
                            "status": "affected"
                        },
                        {
                            "version": "MT6878",
                            "status": "affected"
                        },
                        {
                            "version": "MT6879",
                            "status": "affected"
                        },
                        {
                            "version": "MT6880",
                            "status": "affected"
                        },
                        {
                            "version": "MT6881",
                            "status": "affected"
                        },
                        {
                            "version": "MT6883",
                            "status": "affected"
                        },
                        {
                            "version": "MT6885",
                            "status": "affected"
                        },
                        {
                            "version": "MT6886",
                            "status": "affected"
                        },
                        {
                            "version": "MT6889",
                            "status": "affected"
                        },
                        {
                            "version": "MT6890",
                            "status": "affected"
                        },
                        {
                            "version": "MT6891",
                            "status": "affected"
                        },
                        {
                            "version": "MT6893",
                            "status": "affected"
                        },
                        {
                            "version": "MT6895",
                            "status": "affected"
                        },
                        {
                            "version": "MT6896",
                            "status": "affected"
                        },
                        {
                            "version": "MT6897",
                            "status": "affected"
                        },
                        {
                            "version": "MT6899",
                            "status": "affected"
                        },
                        {
                            "version": "MT6980",
                            "status": "affected"
                        },
                        {
                            "version": "MT6982",
                            "status": "affected"
                        },
                        {
                            "version": "MT6983",
                            "status": "affected"
                        },
                        {
                            "version": "MT6985",
                            "status": "affected"
                        },
                        {
                            "version": "MT6986",
                            "status": "affected"
                        },
                        {
                            "version": "MT6988",
                            "status": "affected"
                        },
                        {
                            "version": "MT6989",
                            "status": "affected"
                        },
                        {
                            "version": "MT6990",
                            "status": "affected"
                        },
                        {
                            "version": "MT6991",
                            "status": "affected"
                        },
                        {
                            "version": "MT6993",
                            "status": "affected"
                        },
                        {
                            "version": "MT8668",
                            "status": "affected"
                        },
                        {
                            "version": "MT8676",
                            "status": "affected"
                        },
                        {
                            "version": "MT8678",
                            "status": "affected"
                        },
                        {
                            "version": "MT8695",
                            "status": "affected"
                        },
                        {
                            "version": "MT8696",
                            "status": "affected"
                        },
                        {
                            "version": "MT8755",
                            "status": "affected"
                        },
                        {
                            "version": "MT8771",
                            "status": "affected"
                        },
                        {
                            "version": "MT8775",
                            "status": "affected"
                        },
                        {
                            "version": "MT8791",
                            "status": "affected"
                        },
                        {
                            "version": "MT8791T",
                            "status": "affected"
                        },
                        {
                            "version": "MT8792",
                            "status": "affected"
                        },
                        {
                            "version": "MT8793",
                            "status": "affected"
                        },
                        {
                            "version": "MT8796",
                            "status": "affected"
                        },
                        {
                            "version": "MT8797",
                            "status": "affected"
                        },
                        {
                            "version": "MT8798",
                            "status": "affected"
                        },
                        {
                            "version": "MT8863",
                            "status": "affected"
                        },
                        {
                            "version": "MT8873",
                            "status": "affected"
                        },
                        {
                            "version": "MT8883",
                            "status": "affected"
                        },
                        {
                            "version": "MT8893",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.mediatek.com/product-security-bulletin/October-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": 7.5,
                            "attackVector": "ADJACENT_NETWORK",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "HIGH",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-05T10:32:52.016063Z",
                                "id": "CVE-2026-20520",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-05T10:32:54.659Z"
                }
            }
        ]
    }
}