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CVE-2020-36987

Status: DeferredHigh (8.5)—

Program Access Controller 1.2.0.0 contains an unquoted service path vulnerability in PACService.exe that allows local attackers to execute code with elevated privileges. Attackers can exploit the unquoted path during system startup or reboot to inject and run malicious executables with LocalSystem permissions.

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).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector AV:L PR:L indica acceso local con privilegios de usuario. CWE-428 (unquoted service path) permite inyectar ejecutables maliciosos en ruta de servicio durante arranque, logrando ejecución de código (T1059) con permisos LocalSystem (elevación T1548) sin interacción del usuario.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Execution PreventionPrivileged Account ManagementAuditUpdate SoftwareUser Account ManagementThreat Intelligence Program

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Program Access Controller — Program Access ControllerAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-36987",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2020-36987",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-28T14:53:24.537472Z"
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    "cvssMetricV31": [
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          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
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          "attackComplexity": "LOW",
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    ],
    "cvssMetricV40": [
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        "type": "Secondary",
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        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "LOCAL",
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
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          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "source": "disclosure@vulncheck.com",
      "affectedData": [
        {
          "vendor": "Gearboxcomputers",
          "product": "Program Access Controller",
          "versions": [
            {
              "status": "affected",
              "version": "1.2.0.0"
            }
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  "published": "2026-01-28T13:15:51.590",
  "references": [
    {
      "url": "https://www.exploit-db.com/exploits/48966",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.gearboxcomputers.com/",
      "source": "disclosure@vulncheck.com"
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    {
      "url": "https://www.vulncheck.com/advisories/program-access-controller-pacserviceexe-unquoted-service-path",
      "source": "disclosure@vulncheck.com"
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  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
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      "lang": "en",
      "value": "Program Access Controller 1.2.0.0 contains an unquoted service path vulnerability in PACService.exe that allows local attackers to execute code with elevated privileges. Attackers can exploit the unquoted path during system startup or reboot to inject and run malicious executables with LocalSystem permissions."
    },
    {
      "lang": "es",
      "value": "Program Access Controller 1.2.0.0 contiene una vulnerabilidad de ruta de servicio sin comillas en PACService.exe que permite a atacantes locales ejecutar código con privilegios elevados. Los atacantes pueden explotar la ruta sin comillas durante el inicio o reinicio del sistema para inyectar y ejecutar ejecutables maliciosos con permisos de LocalSystem."
    }
  ],
  "lastModified": "2026-06-17T03:16:41.450",
  "sourceIdentifier": "disclosure@vulncheck.com"
}