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Vulnerability record · CVE-2026-20841 · published 10 February 2026

CVE-2026-20841: Microsoft windows notepad command injection vulnerability

Microsoft · Windows Notepad

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

7.8 CVSS 3.1 High EPSS 12% · top 3.9% CWE-77 · Command injection
7.8CVSS 3.1 base score
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20841 Vendor Advisory
https://news.ycombinator.com/item?id=46971516 Issue Tracking

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Source: NIST National Vulnerability Database (record CVE-2026-20841), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.