CVE-2026-33596
Estado: AnalizadaMedia (6.5)—
A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 6.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.39%
- Percentil entre todas las CVEs puntuadas: 31
- Fecha de la puntuación: 5/10/2026
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).
Tecnologías afectadas (1)
CWE
- CWE-190
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-33596",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-33596",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-04-22T14:43:12.207234Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security@open-xchange.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 3.1,
"attackVector": "ADJACENT_NETWORK",
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "LOW",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 1.4,
"exploitabilityScore": 1.6
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 6.5,
"attackVector": "ADJACENT_NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/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": 2.8
}
]
},
"affected": [
{
"source": "security@open-xchange.com",
"affectedData": [
{
"repo": "https://github.com/PowerDNS/pdns",
"vendor": "PowerDNS",
"modules": [
"Outgoing DNS over TCP"
],
"product": "DNSdist",
"versions": [
{
"status": "affected",
"version": "1.9.0",
"lessThan": "1.9.13",
"versionType": "semver"
},
{
"status": "affected",
"version": "2.0.0",
"lessThan": "2.0.4",
"versionType": "semver"
}
],
"packageName": "dnsdist",
"programFiles": [
"dnsdist-tcp-downstream.hh"
],
"collectionURL": "https://repo.powerdns.com/",
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-04-22T14:16:54.073",
"references": [
{
"url": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html",
"tags": [
"Vendor Advisory"
],
"source": "security@open-xchange.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-190"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend."
}
],
"lastModified": "2026-06-17T10:37:45.780",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DCC2DF11-EC5C-4112-90F2-C266CB65D390",
"versionEndExcluding": "1.9.13",
"versionStartIncluding": "1.9.0"
},
{
"criteria": "cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "29865EC6-C1A0-40F3-B0BB-7F71F9C1DCB7",
"versionEndExcluding": "2.0.4",
"versionStartIncluding": "2.0.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security@open-xchange.com"
}