As cited
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vulnerabilities
CVE-2026-20841: Arbitrary Code Execution in the Windows Notepad
A command injection vulnerability in Windows Notepad allows remote code execution through malicious Markdown files with specially crafted links. The flaw stems from insufficient validation of link protocols, enabling attackers to execute arbitrary commands in the victim's security context when a user clicks a malicious link in a .md file opened in Notepad. The vulnerability was discovered by researchers at Delta Obscura and has been patched.
Why it matters: Organizations should patch Windows Notepad to prevent arbitrary command execution if users open untrusted Markdown files and click embedded links.
- Source published
- First seen by Cybersecurity Tracker
Source attribution
Correction
Correction recorded as of .
vulnerabilities
CVE-2026-20841: Arbitrary Code Execution in the Windows Notepad
A command injection vulnerability in Windows Notepad allows remote code execution through malicious Markdown files with specially crafted links. The flaw stems from insufficient validation of link protocols, enabling attackers to execute arbitrary commands in the victim's security context when a user clicks a malicious link in a .md file opened in Notepad. The vulnerability was discovered by researchers at Delta Obscura and has been patched.
Why it matters: Organizations should patch Windows Notepad to prevent arbitrary command execution if users open untrusted Markdown files and click embedded links.
- Source published
- First seen by Cybersecurity Tracker