SecuriTricks - CVE-2025-55315

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.

Product(s) Impacted

Vendor	Product	Versions
Microsoft	Asp.net Core	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	microsoft	asp.net_core	/	/	/	/	/	/	/	/

References

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

CVSS Score

9.9 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: LOW
Scope: CHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: LOW

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

View Vector String

Timeline

Published: Oct. 14, 2025, 5:15 p.m.
Last Modified: Oct. 14, 2025, 7:35 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

secure@microsoft.com

CVE-2025-55315