CVE-2026-25667

high Microsoft
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
2.7%
Exploitation probability in 30 days
Top 14% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: March 19, 2026 (55 days ago)
Last Modified: April 22, 2026
Vendor: Microsoft
Source: NVD

Description

ASP.NET Core Kestrel in Microsoft .NET 8.0 before 8.0.22 and .NET 9.0 before 9.0.11 allows a remote attacker to cause excessive CPU consumption by sending a crafted QUIC packet, because of an incorrect exit condition for HTTP/3 Encoder/Decoder stream processing.

CWE

CWE-400

Affected Products

microsoft .net

References

🔗 github.com 🔗 github.com 🔗 github.com