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CVE-2023-42076

Status: AnalyzedHigh (7.8)—

PDF-XChange Editor PDF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of PDF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-21762.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Pdf-xchange — Pdf-toolsPdf-xchange — Pdf-xchange Editor

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2023-42076",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-42076",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-05-03T20:52:59.775986Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "zdi-disclosures@trendmicro.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
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          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 1.8
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    ],
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
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  "affected": [
    {
      "source": "zdi-disclosures@trendmicro.com",
      "affectedData": [
        {
          "vendor": "PDF-XChange",
          "product": "PDF-XChange Editor",
          "versions": [
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              "version": "10.0.1.371"
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    {
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      "affectedData": [
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          "vendor": "pdf-xchange",
          "product": "pdf-xchange_editor",
          "versions": [
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              "status": "affected",
              "version": "10.0.1.371"
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          "vendor": "pdf-xchange",
          "product": "pdf-tools",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.1.371"
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          "vendor": "pdf-xchange",
          "product": "pdf-xchange_pro",
          "versions": [
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              "status": "affected",
              "version": "10.0.1.371"
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  "published": "2024-05-03T03:15:43.437",
  "references": [
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      "url": "https://www.tracker-software.com/support/security-bulletins.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "zdi-disclosures@trendmicro.com"
    },
    {
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1377/",
      "tags": [
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      ],
      "source": "zdi-disclosures@trendmicro.com"
    },
    {
      "url": "https://www.tracker-software.com/support/security-bulletins.html",
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "zdi-disclosures@trendmicro.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "PDF-XChange Editor PDF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of PDF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-21762."
    },
    {
      "lang": "es",
      "value": "PDF-XChange Editor Vulnerabilidad de ejecución remota de código de desbordamiento de búfer de almacenamiento dinámico en el análisis de archivos PDF. Esta vulnerabilidad permite a atacantes remotos ejecutar código arbitrario en instalaciones afectadas de PDF-XChange Editor. Se requiere la interacción del usuario para aprovechar esta vulnerabilidad, ya que el objetivo debe visitar una página maliciosa o abrir un archivo malicioso. La falla específica existe en el análisis de archivos PDF. El problema se debe a la falta de una validación adecuada de la longitud de los datos proporcionados por el usuario antes de copiarlos en un búfer basado en montón de longitud fija. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto del proceso actual. Era ZDI-CAN-21762."
    }
  ],
  "lastModified": "2026-06-17T06:23:24.083",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "matchCriteriaId": "20613507-B038-43F8-B4B5-1C9BA09125F4"
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          "operator": "OR"
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  "sourceIdentifier": "zdi-disclosures@trendmicro.com"
}