Detections
Analytics

CVE-2025-55315

critical

Description

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.

References

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

https://www.securityweek.com/highest-ever-severity-score-assigned-by-microsoft-to-asp-net-core-vulnerability/

https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-highest-severity-aspnet-core-flaw-ever/

https://www.theregister.com/2025/10/16/microsoft_aspnet_core_vulnerability/

https://www.helpnetsecurity.com/2025/10/15/microsoft-patch-tuesday-zero-days-cve-2025-24990-cve-2025-59230-cve-2025-47827/

https://thehackernews.com/2025/10/two-new-windows-zero-days-exploited-in.html

Details

Source: Mitre, NVD

Published: 2025-10-14

Updated: 2025-10-16

Risk Information

CVSS v2

Base Score: 8.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:P

Severity: High

CVSS v3

Base Score: 9.9

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

Severity: Critical

EPSS

EPSS: 0.00038