{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2007-0671",
  "revision": 1,
  "title": "Microsoft Excel — 2007 zero-day in document handling",
  "summary": "Excel 2000 through 2003 and the 2004 Mac edition run the attacker's code when a crafted spreadsheet is opened. The vector was never published; it was used in targeted zero-day attacks in early 2007.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 8.8,
    "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.43241,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": false,
    "attack_complexity": "low",
    "kev_added": "2025-08-12",
    "prerequisites": "The user must open an attacker-supplied spreadsheet in an affected Excel build."
  },
  "kill_chain": "execution",
  "recommended_action": "Retire these Office versions — all are decades out of support, and no current fix exists for any of them.",
  "confidence": "medium",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2007-0671",
      "retrieved_at": "2026-09-24T08:51:39.744Z",
      "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": "2026-09-24T08:51:39.744Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2007-0671",
      "retrieved_at": "2026-09-24T08:51:39.744Z",
      "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-2007-0671",
      "retrieved_at": "2026-09-24T08:51:39.744Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2007-0671",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "http://secunia.com/advisories/24008"
    },
    {
      "type": "vendor_advisory",
      "url": "http://www.microsoft.com/technet/security/advisory/932553.mspx"
    },
    {
      "type": "vendor_advisory",
      "url": "http://www.vupen.com/english/advisories/2007/0463"
    }
  ],
  "published_at": "2007-02-03T01:28:00.000Z",
  "issued_at": "2026-09-24T08:51:39.744Z",
  "tags": [
    "microsoft",
    "office",
    "excel",
    "legacy",
    "zero-day",
    "kev"
  ]
}