What’s Vulnerable › Vulnerabilities
CVE-2026-33116: .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-14 · updated 2026-10-15
- Weakness: CWE-835
Description
Loop with unreachable exit condition ('infinite loop') in .NET, .NET Framework, Visual Studio allows an unauthorized attacker to deny service over a network.
Affected products
- Microsoft .NET: from 10.0.0 before 10.0.6; from 8.0.0 before 8.0.26; from 9.0.0 before 9.0.15 — fixed in 10.0.6, 8.0.26, 9.0.15
- Microsoft .NET Framework: 3.5, 4.7.2, 4.6.2, 4.7, 4.7.1, 4.8 (+1)
- Microsoft .NET: from 10.0.0 before 10.0.6 — fixed in 10.0.6
- Microsoft .NET 8.0: from 8.0 before 8.0.26 — fixed in 8.0.26
- Microsoft .NET 9.0: from 9.0.0 before 9.0.15 — fixed in 9.0.15
- Microsoft .NET Framework 3.5: from 3.5.0 before 2.0.50727.8982 & 3.0.30729.8976 — fixed in 2.0.50727.8982 & 3.0.30729.8976
- Microsoft .NET Framework 3.5 AND 4.7.2: from 4.7.0 before 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 — fixed in 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0
- Microsoft .NET Framework 3.5 AND 4.8: from 4.8.0 before 2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0 — fixed in 2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0
- Microsoft .NET Framework 3.5 AND 4.8.1: from 4.8.1 before 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 — fixed in 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: from 4.7.0 before 4.8.4801.0 — fixed in 4.8.4801.0
- Microsoft .NET Framework 4.8: from 4.8.0 before 4.8.4801.0 — fixed in 4.8.4801.0
How to fix
Upgrade to a fixed version: Microsoft .NET 10.0.6, 8.0.26, 9.0.15; Microsoft .NET 10.0.6; Microsoft .NET 8.0 8.0.26; Microsoft .NET 9.0 9.0.15; Microsoft .NET Framework 3.5 2.0.50727.8982 & 3.0.30729.8976; Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0; Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0; Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.8.4801.0; Microsoft .NET Framework 4.8 4.8.4801.0. Check the vendor advisory for mitigations.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33116
- https://access.redhat.com/errata/RHSA-2026:13280
- https://access.redhat.com/errata/RHSA-2026:13281
- https://access.redhat.com/errata/RHSA-2026:13282
- https://access.redhat.com/errata/RHSA-2026:13283
- https://access.redhat.com/errata/RHSA-2026:13693
- https://access.redhat.com/errata/RHSA-2026:8467
- https://access.redhat.com/errata/RHSA-2026:8468
- https://access.redhat.com/errata/RHSA-2026:8469
- https://access.redhat.com/errata/RHSA-2026:8470
- https://access.redhat.com/errata/RHSA-2026:8471
- https://access.redhat.com/errata/RHSA-2026:8472
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