CVE-2026-20841

Windows Notepad App Remote Code Execution Vulnerability

State: Published
Severity: 7.8 High
Published: Feb 10, 2026
Updated: Aug 19, 2026
Reserved: Dec 3, 2025

Description

Improper neutralization of special elements used in a command ('command injection') in Windows Notepad App allows an unauthorized attacker to execute code locally.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

Affected Products

Product	Versions
Windows NotepadMicrosoft	11.0.0 to before 11.2512.26.0Affected

References

Windows Notepad App Remote Code Execution Vulnerabilityvendor-advisorypatch
https://news.ycombinator.com/item?id=46971516

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