CVE-2025-43494
Estado: ModificadaAlta (7.5)—
A mail header parsing issue was addressed with improved checks. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, visionOS 26.1, watchOS 26.1. An attacker may be able to cause a persistent denial-of-service.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.57%
- Percentil entre todas las CVEs puntuadas: 46
- 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
T1190Exploit Public-Facing Applicationinitial access75 % - Impacto principal
T1499.004Application or System Exploitationimpact80 %
Vector de red sin autenticación (AV:N/PR:N/UI:N) sugiere T1190. El parsing de cabeceras de mail es vulnerable a DoS persistente por entrada malformada (CWE-20), mapeado a T1499.004 (application exhaustion).
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 (5)
CWE
- CWE-20
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-43494",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-43494",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-12-16T04:56:01.440750Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "product-security@apple.com",
"affectedData": [
{
"vendor": "Apple",
"product": "iOS and iPadOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "18.7.2",
"versionType": "custom"
},
{
"status": "affected",
"version": "0",
"lessThan": "26.1",
"versionType": "custom"
}
]
},
{
"vendor": "Apple",
"product": "macOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "14.8.2",
"versionType": "custom"
},
{
"status": "affected",
"version": "0",
"lessThan": "15.7.2",
"versionType": "custom"
},
{
"status": "affected",
"version": "0",
"lessThan": "26.1",
"versionType": "custom"
}
]
},
{
"vendor": "Apple",
"product": "visionOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.1",
"versionType": "custom"
}
]
},
{
"vendor": "Apple",
"product": "watchOS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.1",
"versionType": "custom"
}
]
}
]
}
],
"published": "2025-12-12T21:15:55.390",
"references": [
{
"url": "https://support.apple.com/en-us/125632",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/en-us/125633",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/en-us/125634",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/en-us/125635",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/en-us/125636",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/en-us/125638",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/en-us/125639",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "product-security@apple.com"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-20"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A mail header parsing issue was addressed with improved checks. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, visionOS 26.1, watchOS 26.1. An attacker may be able to cause a persistent denial-of-service."
},
{
"lang": "es",
"value": "Se abordó un problema de análisis de encabezados de correo con comprobaciones mejoradas. Este problema se solucionó en watchOS 26.1, iOS 18.7.2 y iPadOS 18.7.2, macOS Tahoe 26.1, visionOS 26.1, macOS Sonoma 14.8.2, macOS Sequoia 15.7.2, iOS 26.1 y iPadOS 26.1. Un atacante podría causar una denegación de servicio persistente."
}
],
"lastModified": "2026-09-30T20:10:00.247",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "819E8F86-A336-49A2-853F-249459279A59",
"versionEndExcluding": "18.7.2"
},
{
"criteria": "cpe:2.3:o:apple:ipados:26.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4173F942-2CF6-447E-A942-948F6EF6CE77"
},
{
"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7B98B4A6-EFB0-4651-BF56-06917E7CEC85",
"versionEndExcluding": "18.7.2"
},
{
"criteria": "cpe:2.3:o:apple:iphone_os:26.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E29A276A-7091-42B2-B893-6A5801A0716E"
},
{
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9827CBDC-8C03-46BA-B534-8533F0975804",
"versionEndExcluding": "14.8.2",
"versionStartIncluding": "14.0"
},
{
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4BE8199E-63D1-496C-B107-52853CFC2311",
"versionEndExcluding": "15.7.2",
"versionStartIncluding": "15.0"
},
{
"criteria": "cpe:2.3:o:apple:macos:26.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "551159EE-8311-4A13-802D-85871DAB5E77"
},
{
"criteria": "cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7DFD3616-65CA-4E5C-849C-3C20ACBCB610",
"versionEndExcluding": "26.1"
},
{
"criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9F9D7F76-13FB-407C-94E5-221B93021568",
"versionEndExcluding": "26.1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "product-security@apple.com"
}