{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2026-8398",
  "revision": 1,
  "title": "Daemon Tools Lite — trojanized installers signed with the real key",
  "summary": "Windows installers for Daemon Tools Lite 12.5.0.2421 through 12.5.0.2434, downloaded from the vendor's own site between April and May 2026, carried three backdoored programs signed with the vendor's genuine code-signing key.",
  "source_type": "cve",
  "severity": "critical",
  "cvss": {
    "score": 9.3,
    "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
    "version": "4.0"
  },
  "epss": 0.01456,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": true,
    "attack_complexity": "low",
    "kev_added": "2026-05-27",
    "prerequisites": "The victim installed Daemon Tools Lite from the vendor site during the four weeks the packages were trojanized."
  },
  "kill_chain": "initial_access",
  "recommended_action": "Remove Daemon Tools Lite from machines that installed it between 8 April and 5 May 2026, treat those hosts as compromised, and rotate the credentials used on them.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-8398",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2026-8398",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-8398",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8398",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "https://blog.daemon-tools.cc/post/security-incident"
    },
    {
      "type": "exploit",
      "url": "https://securelist.com/tr/daemon-tools-backdoor/119654/"
    }
  ],
  "published_at": "2026-05-15T09:16:17.653Z",
  "issued_at": "2026-09-24T06:28:59.498Z",
  "tags": [
    "daemon-tools",
    "supply-chain",
    "backdoor",
    "code-signing",
    "windows",
    "kev"
  ]
}