---
title: "CVE-2026-77605: Notepad++ - Command Injection"
description: "Notepad++ < 8.9.8 contains a command injection caused by improper resolution of sibling files in Folder as Workspace Run by system action, letting attackers execute arbitrary scripts as the current user, exploit requires user to invoke Run by system on a crafted file."
url: https://panop.io/threat-heartbeat/CVE-2026-77605/
---

# CVE-2026-77605 Notepad++ - Command Injection

Notepad++ < 8.9.8 contains a command injection caused by improper resolution of sibling files in Folder as Workspace Run by system action, letting attackers execute arbitrary scripts as the current user, exploit requires user to invoke Run by system on a crafted file.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-77605)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

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

Published

22 September 2026

Updated

15 October 2026

Weakness

[CWE-20](https://cwe.mitre.org/data/definitions/20.html)

## Vendor fix

Update to version 8.9.8 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-77605](https://nvd.nist.gov/vuln/detail/CVE-2026-77605)
- [https://github.com/notepad-plus-plus/notepad-plus-plus/commit/00fa5df0da1d4f6b334317aa979db13ac77ee24d](https://github.com/notepad-plus-plus/notepad-plus-plus/commit/00fa5df0da1d4f6b334317aa979db13ac77ee24d)
- [https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8](https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8)
- [https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-w5xq-frjg-w4cw](https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-w5xq-frjg-w4cw)
- [https://notepad-plus-plus.org/news/v898-released](https://notepad-plus-plus.org/news/v898-released)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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