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CVE-2026-34401

MEDIUM

6.5

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung6.5

SchweregradMEDIUM

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

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienNONE

BenutzerinteraktionREQUIRED

Veroffentlicht3/31/2026

Zuletzt geandert4/1/2026

Quellenvd

Honeypot-Sichtungen0

Schwachen (CWE)

CWE-611

Referenzen

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)

IOC Korrelationen

Keine Korrelationen erfasst

This product uses data from the NVD API but is not endorsed or certified by the NVD.