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CVE-2026-77605

Notepad++ “Run by system” executes .txt.cmd when user selected .txt (target confusion → command execution)

CVSS 3.1 7.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-77605

Published

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the Folder as Workspace Run by system action in Notepad++ can resolve a different sibling file than the file selected by the user. When an attacker places a command script whose name is the selected text-file path with .cmd appended, and the user invokes Run by system on the text file on Windows 10 or Windows 11, Notepad++ can execute the sibling script as the current user instead of opening the selected file. This issue is fixed in version 8.9.8.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-77605

Published

notepad-plus-plus

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "notepad-plus-plus",
                    "product": "notepad-plus-plus",
                    "versions": [
                        {
                            "version": "< 8.9.8",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON