markdown vulnerability

The tag covers a high-severity remote code execution vulnerability (CVE-2026-20841) in Windows Notepad's Markdown rendering feature. Microsoft's February Patch Tuesday addressed the flaw, which allowed crafted Markdown links to launch unverified protocols and execute code with user privileges. The vulnerability emerged after Microsoft modernized Notepad with Markdown support, expanding its attack surface. Discussions focus on the technical details of the exploit, the importance of applying the security update, and the broader implications of adding rich features to traditionally simple Windows utilities.