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.
History

Mon, 28 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 22 Sep 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Notepad-plus-plus
Notepad-plus-plus notepad++
Vendors & Products Notepad-plus-plus
Notepad-plus-plus notepad++

Tue, 22 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Notepad++ “Run by system” executes *.txt.cmd when user selected *.txt (target confusion → command execution)
Weaknesses CWE-20
CWE-706
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-09-22T17:13:21.434Z

Updated: 2026-09-28T17:37:49.718Z

Reserved: 2026-08-20T20:48:20.507Z

Link: CVE-2026-77605

cve-icon Vulnrichment

Updated: 2026-09-28T17:37:28.487Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-22T18:17:19.393

Modified: 2026-09-28T18:17:25.143

Link: CVE-2026-77605

cve-icon Redhat

No data.