CVE-2026-20841

Published: Feb 10, 2026Modified: Jun 17, 2026

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

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

Affected (1)

Products: Microsoft: Windows Notepad

Microsoft

1 product

Windows Notepad

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows Notepad	Before 11.2510

Related CWEs

CWE-77

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

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

References (2)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20841

Source: secure@microsoft.com

Vendor Advisory

https://news.ycombinator.com/item?id=46971516

Source: af854a3a-2127-422b-91ae-364da2661108

Issue Tracking

Timeline

No history available yet.