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ONE Sentinel

securitySecurity/THREATS/CRIT

Windows 11 Notepad flaw let files execute silently via Markdown links

sourceBleeping Computer
calendar_todayFebruary 12, 2026
schedule1 min read
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EXECUTIVE SUMMARY

Critical Windows 11 Notepad Flaw Allows Silent Code Execution

Summary

Microsoft has addressed a critical security vulnerability in Windows 11's Notepad application. The flaw permitted remote code execution via specially crafted Markdown links, potentially allowing attackers to run programs without user awareness.

Key Points

  • The vulnerability affected Windows 11 Notepad, enabling remote code execution.
  • Attackers could exploit this flaw by tricking users into clicking on malicious Markdown links.
  • The issue allowed execution of local or remote programs without triggering Windows security warnings.
  • Microsoft has released a fix to address this security concern.

Analysis

This vulnerability is significant due to its potential to allow remote code execution without user consent or security warnings, posing a substantial risk to users. The silent nature of the exploit increases its danger, as users might unknowingly trigger malicious activities. The swift action by Microsoft to patch this flaw highlights the importance of maintaining up-to-date security measures.

Conclusion

IT professionals should ensure that all systems running Windows 11 are updated with the latest patches to mitigate this vulnerability. Regularly educating users on the risks of clicking unknown links can also help prevent exploitation.