Windows 11 Notepad flaw let files execute silently via Markdown links
Bleeping Computer
by Lawrence AbramsFebruary 11, 2026
Microsoft has fixed a "remote code execution" vulnerability in Windows 11 Notepad that allowed attackers to execute local or remote programs by tricking users into clicking specially crafted Markdown links, without displaying any Windows security warnings.
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Originally published on Bleeping Computer on 2/11/2026