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CVE-2026-42255

Estado: AnalizadaMedia (6.5)—

Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.

CVSS

Probabilidad de explotación (EPSS)

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)

Technitium — Dnsserver

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-42255",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42255",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-27T13:20:27.700885Z"
        }
      }
    ],
    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
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        "exploitabilityScore": 3.9
      },
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "Technitium",
          "product": "DnsServer",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "15.0.0",
              "versionType": "custom"
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          "packageURL": "pkg:docker/technitium/dns-server",
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  "published": "2026-04-26T04:16:05.787",
  "references": [
    {
      "url": "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#technitium-dns-server-change-log",
      "tags": [
        "Release Notes"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "cve@mitre.org",
      "description": [
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          "lang": "en",
          "value": "CWE-684"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation."
    }
  ],
  "lastModified": "2026-06-17T10:47:35.323",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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