CVE-2026-20457
Full vulnerability record from the local CVENow database.
Description
In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, 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: MOLY01826924; Issue ID: MSV-7301.
Severity
MEDIUM
CVSS score
5.3
(v3.1)
Vulnerability status
Deferred
Source identifier
Published
2026-07-01 04:17:13.100000
Last modified
2026-10-25 17:10:00.197000
View original CVE JSON
{
"id": "CVE-2026-20457",
"sourceIdentifier": "[email protected]",
"published": "2026-07-01T04:17:13.100",
"lastModified": "2026-10-25T17:10:00.197",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, 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: MOLY01826924; Issue ID: MSV-7301."
},
{
"lang": "es",
"value": "En el módem, existe una posible caída del sistema debido a una validación de entrada incorrecta. Esto podría llevar a una denegación de servicio remota, si un UE se ha conectado a una estación base maliciosa controlada por el atacante, sin necesidad de privilegios de ejecución adicionales. No se necesita interacción del usuario para la explotación. ID del parche: MOLY01826924; ID del problema: MSV-7301."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "MediaTek, Inc.",
"product": "MediaTek chipset",
"defaultStatus": "unaffected",
"versions": [
{
"version": "MT2735",
"status": "affected"
},
{
"version": "MT2737",
"status": "affected"
},
{
"version": "MT6739",
"status": "affected"
},
{
"version": "MT6761",
"status": "affected"
},
{
"version": "MT6762",
"status": "affected"
},
{
"version": "MT6763",
"status": "affected"
},
{
"version": "MT6765",
"status": "affected"
},
{
"version": "MT6767",
"status": "affected"
},
{
"version": "MT6768",
"status": "affected"
},
{
"version": "MT6769",
"status": "affected"
},
{
"version": "MT6771",
"status": "affected"
},
{
"version": "MT6779",
"status": "affected"
},
{
"version": "MT6781",
"status": "affected"
},
{
"version": "MT6783",
"status": "affected"
},
{
"version": "MT6785",
"status": "affected"
},
{
"version": "MT6789",
"status": "affected"
},
{
"version": "MT6833",
"status": "affected"
},
{
"version": "MT6853",
"status": "affected"
},
{
"version": "MT6855",
"status": "affected"
},
{
"version": "MT6873",
"status": "affected"
},
{
"version": "MT6875",
"status": "affected"
},
{
"version": "MT6877",
"status": "affected"
},
{
"version": "MT6879",
"status": "affected"
},
{
"version": "MT6880",
"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": "MT6980",
"status": "affected"
},
{
"version": "MT6983",
"status": "affected"
},
{
"version": "MT6985",
"status": "affected"
},
{
"version": "MT6989",
"status": "affected"
},
{
"version": "MT6990",
"status": "affected"
},
{
"version": "MT8666",
"status": "affected"
},
{
"version": "MT8667",
"status": "affected"
},
{
"version": "MT8673",
"status": "affected"
},
{
"version": "MT8675",
"status": "affected"
},
{
"version": "MT8765",
"status": "affected"
},
{
"version": "MT8766",
"status": "affected"
},
{
"version": "MT8766R",
"status": "affected"
},
{
"version": "MT8768",
"status": "affected"
},
{
"version": "MT8771",
"status": "affected"
},
{
"version": "MT8781",
"status": "affected"
},
{
"version": "MT8786",
"status": "affected"
},
{
"version": "MT8788",
"status": "affected"
},
{
"version": "MT8788E",
"status": "affected"
},
{
"version": "MT8789",
"status": "affected"
},
{
"version": "MT8791",
"status": "affected"
},
{
"version": "MT8791T",
"status": "affected"
},
{
"version": "MT8795T",
"status": "affected"
},
{
"version": "MT8796",
"status": "affected"
},
{
"version": "MT8797",
"status": "affected"
},
{
"version": "MT8798",
"status": "affected"
},
{
"version": "MT8893",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"attackVector": "ADJACENT_NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.6,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-07-01T10:40:08.598256Z",
"id": "CVE-2026-20457",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"references": [
{
"url": "https://corp.mediatek.com/product-security-bulletin/July-2026",
"source": "[email protected]"
}
]
}