# CVE-2026-73250: 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-73250
- Priority: Routine
- CVSS: 5.4
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 11, 2026
- Weakness: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-73250

## Description

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

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Notepad++ | 8.9.7 | [Notepad++ 8.9.7](https://patchblox.com/security/data/fix/windows-app/notepad-.notepad-8.9.7.md) | Jul 14, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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