Vulnerability Description
Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.
CVSS Score
9.9
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Asp.Net Core | >= 2.3.0, < 2.3.6 |
| Microsoft | Visual Studio 2022 | >= 17.10.0, < 17.10.20 |
Related Weaknesses (CWE)
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315Vendor Advisory
- https://andrewlock.net/understanding-the-worst-dotnet-vulnerability-request-smug
- https://gist.github.com/N3mes1s/d0897c13ca199e739ecc2b562f466040
FAQ
What is CVE-2025-55315?
CVE-2025-55315 is a vulnerability with a CVSS score of 9.9 (CRITICAL). Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.
How severe is CVE-2025-55315?
CVE-2025-55315 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-55315?
Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Asp.Net Core, Microsoft Visual Studio 2022.