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CVE-2026-52884

Estado: AnalizadaAlta (7.8)—

Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonicalize the path before checking. It uses a prefix-based check (PathIsPrefix() or equivalent) that matches paths starting with trusted directory strings. A path traversal using ..\..\ after a trusted directory prefix passes the check while resolving to an untrusted location. The CVE-2026-48800 patch adds isInTrustedDirectory() validation in Command::run() (RunDlg.cpp) before calling ShellExecute(). This function checks whether the resolved executable path is under a trusted directory. This vulnerability is fixed in 8.9.6.2.

CVSS

Probabilidad de explotación (EPSS)

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.

UI:R (interacción del usuario: abrir archivo preparado) + acceso local (AV:L) → T1203 (ejecución en cliente). Path traversal permite ejecutar comandos arbitrarios via ShellExecute tras bypasear validación de directorio confiable.

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

Execution PreventionBehavior Prevention on EndpointRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationDisable or Remove Feature or Program

Tecnologías afectadas (1)

Notepad-plus-plus — Notepad++

CWE

Referencias

JSON original (NVD)

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    }
  ],
  "lastModified": "2026-06-29T21:22:26.173",
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