Notepad++ 8.9.6.2 < 8.9.6.4 TOCTOU Race Condition (CVE-2026-52885)

The version of Notepad++ installed on the remote host is 8.9.6.2 or 8.9.6.3. It is, therefore, affected by a TOCTOU race condition vulnerability: - A time-of-check time-of-use TOCTOU race condition exists in the HMAC verification of shortcuts.xml. The HMAC check validates the on-disk file at...

CVE-2026-52885

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.4, NppCommands.cpp checks the HMAC of the on-disk shortcuts.xml at the moment a user command fires Time-of-Check. However, the command payload is taken from the in-memory userCommands vector, which is populated at application...

CVE-2026-48800

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the tag text content inside in shortcuts.xml is read by NppXml::valueaNode Parameters.cpp:3658 in the feedUserCmds function and stored in UserCommand.cmd without any validation. When the user clicks the corresponding entry ...

CVE-2026-52885

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.4, NppCommands.cpp checks the HMAC of the on-disk shortcuts.xml at the moment a user command fires Time-of-Check. However, the command payload is taken from the in-memory userCommands vector, which is populated at application...

CVE-2026-48800

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the tag text content inside in shortcuts.xml is read by NppXml::valueaNode Parameters.cpp:3658 in the feedUserCmds function and stored in UserCommand.cmd without any validation. When the user clicks the corresponding entry ...

CVE-2026-48800 Notepad++: Arbitrary Code Execution via shortcuts.xml UserCommand Injection

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the tag text content inside in shortcuts.xml is read by NppXml::valueaNode Parameters.cpp:3658 in the feedUserCmds function and stored in UserCommand.cmd without any validation. When the user clicks the corresponding entry ...

PT-2026-52973

Name of the Vulnerable Software and Affected Versions Notepad++ versions prior to 8.9.6.4 Description A Time-of-Check to Time-of-Use TOCTOU flaw exists in NppCommands.cpp. The application validates the HMAC of the shortcuts.xml file on disk when a user command is triggered, but it executes the...

Notepad++ 8.9.6.1 < 8.9.6.2 Multiple Vulnerabilities

The version of Notepad++ installed on the remote host is 8.9.6.1 prior to 8.9.6.2. It is, therefore, affected by multiple vulnerabilities: - An arbitrary code execution vulnerability exists due to improper handling of shortcuts.xml files. A previous fix in version 8.9.6.1 was incomplete, and a...

Exploit for CVE-2026-48800

CVE-2026-48800 — Notepad++ Arbitrary Code Execution PoC Sev...

Notepad++ 8.9 Persistence Module

This Metasploit post-exploitation module abuses a legitimate Notepad++ feature by modifying the shortcuts.xml configuration file to register a custom external tool. The added tool appears in the Notepad++ Run menu and executes a user-defined command when manually selected by the user. This...