CVE-2026-20519
Estado: Pendiente de análisisAlta (7.5)—
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: MOLY01778993; Issue ID: MSV-8898.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.23%
- Percentil entre todas las CVEs puntuadas: 12
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement90 % - Impacto principal
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto secundario
T1059Command and Scripting Interpreterexecution75 %
Vector AV:A (red adyacente) + out-of-bounds write (CWE-787) en módem MediaTek con acceso a estación base falsa permite ejecución remota con escalada a privilegios de sistema sin interacción del usuario.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-787
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-20519",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-20519",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-05T00:00:00+00:00"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"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"
},
"impactScore": 5.9,
"exploitabilityScore": 1.6
}
]
},
"affected": [
{
"source": "security@mediatek.com",
"affectedData": [
{
"vendor": "MediaTek, Inc.",
"product": "MediaTek chipset",
"versions": [
{
"status": "affected",
"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"
}
],
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-10-05T02:16:50.393",
"references": [
{
"url": "https://www.mediatek.com/product-security-bulletin/October-2026",
"source": "security@mediatek.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "security@mediatek.com",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
}
],
"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: MOLY01778993; Issue ID: MSV-8898."
}
],
"lastModified": "2026-10-06T15:05:34.080",
"sourceIdentifier": "security@mediatek.com"
}