CVE-2025-55315
ASP.NET Security Feature Bypass Vulnerability
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | microsoft |
| Product | asp.net core 2.3 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Oct 14, 2025 |
| Last Updated | Feb 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / ASP.NET Core 2.3
2.3 < 2.3.6
Microsoft / ASP.NET Core 8.0
8.0 < 8.0.21
Microsoft / ASP.NET Core 9.0
9.0 < 9.0.10
Microsoft / Microsoft Visual Studio 2022 version 17.10
17.10.0 < 17.10.20
Microsoft / Microsoft Visual Studio 2022 version 17.12
17.12.0 < 17.12.13
Microsoft / Microsoft Visual Studio 2022 version 17.14
17.14.0 < 17.14.17