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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2025-55315

CVE-2025-55315

CRITICAL9.9

ASP.NET Security Feature Bypass Vulnerability

Published Oct 14, 2025

Modified 1 weeks ago

References

https://andrewlock.net/understanding-the-worst-dotnet-vulnerability-request-smuggling-and-cve-2025-55315/

https://gist.github.com/N3mes1s/d0897c13ca199e739ecc2b562f466040

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315

https://www.cve.org/CVERecord?id=CVE-2025-55315

CVSS Analysis

CVSS v3.1

9.9

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

Scope

ChangedS:C

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

LowA:L

9.9/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

Weakness Type (CWE)

Other

Ecosystems

Timeline

PublishedOct 14, 2025

ModifiedFeb 22, 2026

CVE-2025-55315 | Mondoo Vulnerability Intelligence