CVE-2026-20841
Windows Notepad App Remote Code Execution Vulnerability
- Published
- Feb 10, 2026
- Updated
- Aug 19, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Aug 6, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 95.2%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Improper neutralization of special elements used in a command ('command injection') in Windows Notepad App allows an unauthorized attacker to execute code locally.
Sources
Proof-of-concept exploit for CVE-2026-20841, a Windows Notepad RCE via markdown links. Generates crafted .md files to trigger remote payloads, app sideloading, or local binary execution.
🛠 Demonstrate remote code execution in Windows Notepad via markdown links exploiting unsecured URL protocols.
Technical analysis and proof-of-concept for a command injection vulnerability in Windows Notepad's markdown rendering, triggered via Control+Click on crafted links, with discussion of exploitation scenarios and mitigations.
PoC for the "Windows Notepad RCE"
- CVE-2026-20841_notepad_analysisResearch
Investigates Microsoft Notepad RCE vulnerability CVE-2026-20841 through binary analysis and PoC exploit development for educational purposes.
🛠 Demonstrate remote code execution in Windows Notepad versions below 11.2510 using the CVE-2026-20841 proof of concept.
Proof-of-concept exploit for CVE-2026-20841 demonstrating remote code execution in Windows Notepad before version 11.2510, intended for vulnerability validation and security research.
Proof-of-concept demonstrating command injection in Windows Notepad via crafted Markdown links, enabling remote code execution. Includes attack vectors, CVSS metrics, and remediation guidance.
Proof-of-concept exploit for CVE-2026-20841, a Windows Notepad remote code execution vulnerability, using a crafted .md file and social engineering to deliver and execute a payload.
Proof of concept demonstrating command execution in Microsoft Notepad via crafted files, enabling arbitrary code execution and system compromise.
Proof-of-concept exploit for CVE-2026-20841, a remote code execution vulnerability in Windows Notepad, demonstrating file-based trigger and execution flow.
PoC for a remote code execution flaw in Windows Notepad's markdown renderer. The markdown engine does not restrict URL protocols, allowing arbitrary protocol handlers to be triggered via clickable links
Exploit code for CVE-2026-20841, a vulnerability in Notepad, providing proof-of-concept for security testing.
Responsible use
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