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Description

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

PUBLISHED Reserved 2025-12-03 | Published 2026-02-10 | Updated 2026-03-16 | Assigner microsoft




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

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

Product status

11.0.0 (custom) before 11.2512
affected

References

news.ycombinator.com/item?id=46971516

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20841 (Windows Notepad App Remote Code Execution Vulnerability) vendor-advisory patch

cve.org (CVE-2026-20841)

nvd.nist.gov (CVE-2026-20841)

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