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CVE-2026-34401

MEDIUM

6.5

Descripcion

XML Notepad is a Windows program that provides a simple intuitive User Interface for browsing and editing XML documents. Prior to version 2.9.0.21, XML Notepad does not disable DTD processing by default which means external entities are resolved automatically. There is a well known attack related to malicious DTD files where an attacker to craft a malicious XML file that loads a DTD that causes XML Notepad to make outbound HTTP/SMB requests, potentially leaking local file contents or capturing the victim's NTLM credentials. This issue has been patched in version 2.9.0.21.

Detalles CVE

Puntuacion CVSS v3.16.5

SeveridadMEDIUM

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioREQUIRED

Publicado3/31/2026

Ultima modificacion4/1/2026

Fuentenvd

Avistamientos honeypot0

Debilidades (CWE)

CWE-611

Referencias

https://github.com/microsoft/XmlNotepad/commit/3665603d61ba10b7827a3724e854748cb780140c(security-advisories@github.com)

https://github.com/microsoft/XmlNotepad/commit/c03ab2311ac6960452eb1ab49098768f851dcc53(security-advisories@github.com)

https://github.com/microsoft/XmlNotepad/releases/tag/2.9.0.21(security-advisories@github.com)

https://github.com/microsoft/XmlNotepad/security/advisories/GHSA-5j32-486h-42ch(security-advisories@github.com)

https://github.com/microsoft/XmlNotepad/security/advisories/GHSA-5j32-486h-42ch(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlaciones IOC

Sin correlaciones registradas

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