Critical RCE Vulnerability in Windows Notepad and RPC Identified

Critical RCE Vulnerability in Windows Notepad and RPC Identified

First seen 12 Feb 2026, 21:16 UTC Purple-OpsThezdi 57.5

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ThreatCluster

CVE-2026-20841, a critical vulnerability with a CVSS score of 9.8, affects Windows Remote Procedure Call (RPC) and allows unauthenticated remote code execution. Additionally, a related issue in Windows Notepad, with a CVSS score of 8.8, enables remote code execution via malicious Markdown files. Both vulnerabilities were published on February 10, 2026, with proof of concept released the following day.

Timeline

2026-02-10
CVE-2026-20841 published
2026-02-11
First public PoC released