CRITICAL 9.9 Microsoft PoC

CVE-2025-55315

ASP.NET Security Feature Bypass Vulnerability

Microsoft Security Update 2025-Oct: ASP.NET Security Feature Bypass Vulnerability

Affected Products

References

Published: 2025-10-14 · Source: Microsoft · Feed updated: 2026-09-24
This critical severity vulnerability with a CVSS score of 9.9 was published on 2025-10-14 via Microsoft. 🚨 A public proof-of-concept exploit is available on GitHub. EPSS score: 65.9% (top 1% of all CVEs by exploitation probability). Affected: ASP.NET Core 8.0, ASP.NET Core 9.0, ASP.NET Core 2.3 and 3 more.

Risk Timeline

CVE Disclosed2025-10-14 · 344 days ago
Public PoC Exploit AvailableWeaponised proof-of-concept code is publicly accessible

Remediation Resources

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