CVE-2026-23666
7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: secure@microsoft.com (Secondary)
Description
Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.
Affected (7)
Products: Microsoft: .net Framework
Configuration C
| Running on/with | Platform Versions |
|---|---|
Microsoft Windows 10 1809 | All versions |
Configuration D
| Vulnerable Software | Affected Versions |
|---|---|
| Version 3.5 |
| Running on/with | Platform Versions |
|---|---|
Microsoft Windows 10 21h2 | All versions |
Microsoft Windows 10 22h2 | All versions |
Microsoft Windows 11 22h2 | All versions |
Microsoft Windows 11 23h2 | All versions |
Microsoft Windows 11 24h2 | All versions |
Microsoft Windows 11 25h2 | All versions |
Microsoft Windows 11 26h1 | All versions |
Microsoft Windows Server 2022 | All versions |
Microsoft Windows Server 2022 23h2 | All versions |
Microsoft Windows Server 2025 | All versions |
Configuration E
| Vulnerable Software | Affected Versions |
|---|---|
| Version 4.6.2 |
Configuration F
| Vulnerable Software | Affected Versions |
|---|---|
| Version 4.8 |
| Running on/with | Platform Versions |
|---|---|
Microsoft Windows 10 1607 | All versions |
Microsoft Windows Server 2012 | All versions |
Related CWEs
CWE-366
Race Condition within a Thread
If two threads of execution use a resource simultaneously, there exists the possibility that resources may be used while invalid, in turn making the state of execution undefined.
CWE-755
Improper Handling of Exceptional Conditions
The product does not handle or incorrectly handles an exceptional condition.
References (4)
Source: secure@microsoft.com
Vendor Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Timeline
No history available yet.