Answer in brief
CVE-2026-33116 records a High severity (CVSS 7.5) vulnerability in .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability. The current sources do not mark it as known exploited. The current feed maps Microsoft/Microsoft .NET Framework 3.5 (generic), Microsoft/Microsoft .NET Framework 3.5 AND 4.7.2 (generic), Microsoft/Microsoft .NET Framework 3.5 AND 4.8 (generic), Microsoft/Microsoft .NET Framework 3.5 AND 4.8.1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Microsoft/Microsoft .NET Framework 3.5 (generic), Microsoft/Microsoft .NET Framework 3.5 AND 4.7.2 (generic), Microsoft/Microsoft .NET Framework 3.5 AND 4.8 (generic), Microsoft/Microsoft .NET Framework 3.5 AND 4.8.1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Microsoft/Microsoft .NET Framework 3.5generic | >=3.5.0 <2.0.50727.8982 & 3.0.30729.8976 | 2.0.50727.8982 & 3.0.30729.8976, 2.0.50727.8982 |
| Microsoft/Microsoft .NET Framework 3.5 AND 4.7.2generic | >=4.7.0 <2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 | 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0, 2.0.50727.9068 |
| Microsoft/Microsoft .NET Framework 3.5 AND 4.8generic | >=4.8.0 <2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0 | 2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0, 2.0.50727.9068 |
| Microsoft/Microsoft .NET Framework 3.5 AND 4.8.1generic | >=4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 | 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0, 2.0.50727.9181 |
| Microsoft/Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2generic | >=4.7.0 <4.8.4801.0 | 4.8.4801.0 |
| Microsoft/Microsoft .NET Framework 4.8generic | >=4.8.0 <4.8.4801.0 | 4.8.4801.0 |
| Microsoft/.NET 10.0generic | >=10.0.0 <10.0.6 | 10.0.6 |
| Microsoft/.NET 8.0generic | >=8.0 <8.0.26 | 8.0.26 |
| Microsoft/.NET 8.0generic | >=8.0.0 <8.0.26 | 8.0.26 |
| Microsoft/.NET 9.0generic | >=9.0.0 <9.0.15 | 9.0.15 |
Published upstream
Apr 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
A flaw was found in .NET. A remote attacker could exploit this vulnerability by crafting a malicious XML document that triggers an infinite recursion within the XmlDecryptionTransform component. This could lead to a Denial of Service (DoS), making the affected system unresponsive.
Quoted source text, attributed separately from HOL analysis.