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Δ / VULNERABILITY RECORD

CVE-2025-55315.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSCRITICAL / 9.9No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Oct 22, 2025

Disclosure summary

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.

Source-reported weakness categories

CWE-444

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2025-Oct

Open original source · Updated Oct 22, 2025

ASP.NET Security Feature Bypass Vulnerability

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 9.9

VendorProduct / associationVersion / bounds
Microsoft update guideASP.NET Core 8.0 (MSRC status code 3)
Microsoft update guideASP.NET Core 9.0 (MSRC status code 3)
Microsoft update guideASP.NET Core 2.3 (MSRC status code 3)
Microsoft update guideMicrosoft Visual Studio 2022 version 17.12 (MSRC status code 3)
Microsoft update guideMicrosoft Visual Studio 2022 version 17.10 (MSRC status code 3)
Microsoft update guideMicrosoft Visual Studio 2022 version 17.14 (MSRC status code 3)

Vendor remediation references

Original records & references

PUBLISHED 2025-10-14T03:00:00-04:00
MODIFIED 2025-10-22T03:00:00-04:00
INGESTED 2026-10-08T12:45:30-04:00