SB2026021074 - Command Injection in Microsoft Windows Notepad App
Published: February 10, 2026 Updated: February 13, 2026
Security Bulletin ID
SB2026021074
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Command Injection (CVE-ID: CVE-2026-20841)
The vulnerability allows a remote attacker to execute arbitrary commands on the system.
The vulnerability exists due to insufficient input validation in Windows Notepad App. A remote attacker can trick a victim into clicking a malicious link inside a Markdown file opened in Notepad and execute arbitrary commands.
Remediation
Install update from vendor's website.