Notepad++: Install-time PowerShell command injection through installation path
CVE-2026-73250 is fixed in Notepad++ on 1 platform by Notepad++ 8.9.7 (version 8.9.7), released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory `$INSTDIR` from PowerEditor/installer/nppSetup.nsi into a PowerShell `-Command` string used by RegisterMSIX to invoke Add-AppxPackage, allowing PowerShell subexpression syntax such as `$()` in the installation path to execute commands in the installer's security context when the context menu component is selected. This issue is fixed in version 8.9.7.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Notepad++ | 8.9.7 | Notepad++ 8.9.7 | Jul 14, 2026 |
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