CVE-2025-55315

critical · 9.9

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.

9.9

CVSS

65.9%

EPSS (exploit prob.)

99th

EPSS percentile

2025-10-14

Published

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Weaknesses

CWE-444

Affected products

Vendor	Product	Affected versions
microsoft	asp.net_core	>= 2.3.0, < 2.3.6
microsoft	asp.net_core	>= 8.0.0, < 8.0.21
microsoft	asp.net_core	>= 9.0.0, < 9.0.10
microsoft	visual_studio_2022	>= 17.10.0, < 17.10.20
microsoft	visual_studio_2022	>= 17.12.10, < 17.12.13
microsoft	visual_studio_2022	>= 17.14.0, < 17.14.17

Check a specific version with /api/v1/cve/match.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315
https://andrewlock.net/understanding-the-worst-dotnet-vulnerability-request-smuggling-and-cve-2025-55315/
https://gist.github.com/N3mes1s/d0897c13ca199e739ecc2b562f466040

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-55315