CVE-2026-23666

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/E:P/RL:O/RC:C
EPSS Score
1.3%
Exploitation probability in 30 days
Top 33% 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: April 14, 2026 (87 days ago)
Last Modified: June 30, 2026
Vendor: Microsoft
Source: MITRE

Description

Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.

CWE

CWE-755

Affected Products

Microsoft Microsoft .NET Framework 3.5Microsoft Microsoft .NET Framework 3.5 AND 4.7.2Microsoft Microsoft .NET Framework 3.5 AND 4.8Microsoft Microsoft .NET Framework 3.5 AND 4.8.1Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Microsoft Microsoft .NET Framework 4.8

References

🔗 msrc.microsoft.com