CVE-2026-33610
A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it.
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: 0.73%
- Percentil entre todas las CVEs puntuadas: 53
- 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 access85 % - Impacto principal
T1499.004Application or System Exploitationimpact80 %
Vector de red sin privilegios (AV:N/PR:N) apunta a T1190. El agotamiento de descriptores de archivo causa negación de servicio (CWE-400), específicamente T1499.004 (aplicación de protocolo).
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)
CWE
- CWE-400
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-33610",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-33610",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-04-22T14:25:29.036113Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security@open-xchange.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.9,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 2.2
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"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": "security@open-xchange.com",
"affectedData": [
{
"repo": "https://github.com/PowerDNS/pdns",
"vendor": "PowerDNS",
"modules": [
"DNS updates forwarding"
],
"product": "Authoritative",
"versions": [
{
"status": "affected",
"version": "5.0.0",
"lessThan": "5.0.4",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.0",
"lessThan": "4.9.14",
"versionType": "semver"
}
],
"packageName": "pdns",
"programFiles": [
"rfc2136handler.cc"
],
"collectionURL": "https://repo.powerdns.com/",
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-04-22T14:16:54.887",
"references": [
{
"url": "https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-05.html",
"tags": [
"Broken Link",
"Vendor Advisory"
],
"source": "security@open-xchange.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-400"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it."
}
],
"lastModified": "2026-06-17T10:37:46.873",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "08464BC2-733F-4260-878D-DE05919A7A7D",
"versionEndExcluding": "4.9.14",
"versionStartIncluding": "4.9.0"
},
{
"criteria": "cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A26C526E-15DC-41BE-9B66-FC6A63679562",
"versionEndExcluding": "5.0.4",
"versionStartIncluding": "5.0.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security@open-xchange.com"
}