CVE-2026-91818

Estado: En análisisAlta (7.8)—

A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s JavaScript handling of PDF annotations. Reentrant page-event processing during annotation enumeration may release the associated page object, which is subsequently accessed, resulting in an application crash.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.12%
Percentil entre todas las CVEs puntuadas: 1
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1203 Exploitation for Client Executionexecution85 %
Impacto principalT1059.007 JavaScriptexecution75 %
Impacto secundarioT1499.004 Application or System Exploitationimpact80 %

Vulnerabilidad use-after-free (CWE-416) en manejo de JavaScript de anotaciones PDF que requiere interacción del usuario (UI:R) para abrir archivo malicioso; impacta ejecución de código y DoS por crash de aplicación.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Restrict Web-Based Content Filter Network Traffic Execution Prevention Behavior Prevention on Endpoint Disable or Remove Feature or Program Application Isolation and Sandboxing

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Foxit — PDF Editor^AI Foxit — PDF Reader^AI

CWE

CWE-416

Referencias

https://www.foxit.com/support/security-bulletins.html

JSON original (NVD)

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  "id": "CVE-2026-91818",
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          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-09-23T14:15:03.019532Z"
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          "attackComplexity": "LOW",
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          "versions": [
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            {
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  "published": "2026-09-23T08:17:14.123",
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  "lastModified": "2026-09-23T17:58:26.570",
  "sourceIdentifier": "14984358-7092-470d-8f34-ade47a7658a2"
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