CVE-2025-21171

Summary

CVE-2025-21171 is a newly disclosed remote code execution vulnerability affecting Microsoft .NET. Attackers can exploit this issue by sending specially crafted requests to a vulnerable .NET server, resulting in arbitrary code execution on the targeted system. Successful exploitation can lead to serious consequences, including data theft, unauthorized system access, and the installation of malware. Microsoft has released a patch to address this vulnerability, and it is strongly recommended that all affected systems be updated promptly to mitigate the risk.

Prevent cyber attacks with Recorded Future by prioritizing and patching critical vulnerabilities being exploited by threat actors targeting your industry. Book your demo to learn more.