{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2026-34621",
  "revision": 1,
  "title": "Adobe Acrobat and Reader — prototype pollution to code execution",
  "summary": "Acrobat Reader 24.001.30356, 26.001.21367 and earlier let a crafted file alter the prototype of an object it should never reach, which ends in code running as the person who opened the document.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 8.6,
    "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.07086,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": false,
    "attack_complexity": "low",
    "kev_added": "2026-04-13",
    "prerequisites": "The victim must open an attacker-supplied document in an affected build."
  },
  "remediation": {
    "patch_available": true
  },
  "kill_chain": "execution",
  "recommended_action": "Update Acrobat and Reader per Adobe bulletin APSB26-43 now; until then open documents from outside the organisation in a plain viewer rather than the full reader.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-34621",
      "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-2026-34621",
      "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-2026-34621",
      "retrieved_at": "2026-09-24T08:51:39.744Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34621",
      "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://helpx.adobe.com/security/products/acrobat/apsb26-43.html"
    }
  ],
  "published_at": "2026-04-11T07:16:03.633Z",
  "issued_at": "2026-09-24T08:51:39.744Z",
  "tags": [
    "adobe",
    "acrobat",
    "reader",
    "prototype-pollution",
    "kev"
  ]
}