{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2009-0556",
  "revision": 1,
  "title": "Microsoft PowerPoint — crafted file corrupts memory",
  "summary": "PowerPoint 2000 through 2003 and the 2004 Mac edition corrupt memory on an invalid index inside a presentation file, letting whoever sent it run code as the person who opened it. Used in the wild from April 2009.",
  "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": 0.67312,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": false,
    "attack_complexity": "low",
    "kev_added": "2026-01-07",
    "prerequisites": "The user must open an attacker-supplied presentation in an affected PowerPoint build."
  },
  "remediation": {
    "patch_available": true
  },
  "kill_chain": "execution",
  "recommended_action": "Retire these Office versions — all are far out of support, and the 2009 update is the last fix any of them received.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2009-0556",
      "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-2009-0556",
      "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-2009-0556",
      "retrieved_at": "2026-09-24T08:51:39.744Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2009-0556",
      "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://blogs.technet.com/mmpc/archive/2009/04/02/new-0-day-exploits-using-powerpoint-files.aspx"
    },
    {
      "type": "vendor_advisory",
      "url": "http://blogs.technet.com/msrc/archive/2009/04/02/microsoft-security-advisory-969136.aspx"
    },
    {
      "type": "vendor_advisory",
      "url": "http://blogs.technet.com/srd/archive/2009/04/02/investigating-the-new-powerpoint-issue.aspx"
    }
  ],
  "published_at": "2009-04-03T18:30:00.610Z",
  "issued_at": "2026-09-24T08:51:39.744Z",
  "tags": [
    "microsoft",
    "office",
    "powerpoint",
    "legacy",
    "remote-code-execution",
    "kev"
  ]
}