CVE-2025-21171: Microsoft Security Advisory CVE-2025-21171 | .NET Remote Code Execution Vulnerability

January 14, 2025

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 9.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

An attacker could exploit this vulnerability by sending a specially crafted request to the vulnerable web server.

References

github.com/advisories/GHSA-p54p-p3qm-8vgj
github.com/dotnet/runtime
github.com/dotnet/runtime/security/advisories/GHSA-p54p-p3qm-8vgj
msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21171
nvd.nist.gov/vuln/detail/CVE-2025-21171

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