7.5
High
CVE-2026-23666 Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network
Description
Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft .NET Framework 3.5 3.5 | 3.5.0 → latest | No fix stated |
| Microsoft .NET Framework 3.5 AND 4.7.2 4.7 | 4.7.0 → latest | No fix stated |
| Microsoft .NET Framework 3.5 AND 4.8 4.8 | 4.8.0 → latest | No fix stated |
| Microsoft .NET Framework 3.5 AND 4.8.1 4.8 | 4.8.1 → latest | No fix stated |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7 | 4.7.0 → < 4.8.4801.0 | 4.8.4801.0 |
| Microsoft .NET Framework 4.8 4.8 | 4.8.0 → < 4.8.4801.0 | 4.8.4801.0 |
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published |
Show the other branch Hide the other branch
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Hardened Images | Versions not published |
References
- .NET Framework Denial of Service Vulnerability msrc.microsoft.com
Timeline
- Published
- Last modified
Other CVEs of Microsoft .NET Framework 3.5
The 83 CVEs of Microsoft .NET Framework 3.5 →
CVE-2026-97801
Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering…
7.5
High
CVE-2026-58280
Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network
7.5
High
CVE-2026-97788
Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose…
7.5
High
CVE-2026-96959
Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a…
7.5
High