Vulnerability Intelligence Report
ASP.NET Security Feature Bypass Vulnerability
CVE-2025-55315
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.
No Active Exploit Signals
CVSS Base Score
9.9
CRITICAL
Exploitability:3.2
Impact Score:6.0
EPSS Probability:66.26%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-444 ↗CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | ASP.NET Core 2.3 | 2.3 < 2.3.6 (affected) |
| Microsoft | ASP.NET Core 8.0 | 8.0 < 8.0.21 (affected) |
| Microsoft | ASP.NET Core 9.0 | 9.0 < 9.0.10 (affected) |
| Microsoft | Microsoft Visual Studio 2022 version 17.10 | 17.10.0 < 17.10.20 (affected) |
| Microsoft | Microsoft Visual Studio 2022 version 17.12 | 17.12.0 < 17.12.13 (affected) |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 < 17.14.17 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
66.258%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2025-08-12T20:19:59 |
| Published | 2025-10-14T17:00:10 |
| Patch Date | 2025-10-14 |
| Last Updated | 2026-02-22T17:24:12 |
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