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CVE-2018-0765

HIGH

Denial of service vulnerability exists when .NET and .NET Core improperly process XML documents

Published October 16, 2018Updated November 8, 2023Source: osv

Summary

A denial of service vulnerability exists when .NET and .NET Core improperly process XML documents, aka ".NET and .NET Core Denial of Service Vulnerability." This affects Microsoft .NET Framework 2.0, Microsoft .NET Framework 3.0, Microsoft .NET Framework 4.7.1, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1, Microsoft .NET Framework 4.5.2, Microsoft .NET Framework 4.7/4.7.1, Microsoft .NET Framework 4.6, Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6/4.6.1/4.6.2, Microsoft .NET Framework 4.6.2/4.7/4.7.1, .NET Core 2.0, Microsoft .NET Framework 4.7.2.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update System.Security.Cryptography.Xml to 4.4.2 or later
dotnet add package System.Security.Cryptography.Xml --version 4.4.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

PackageEcosystemAffectedFixed In
System.Security.Cryptography.Xml
nuget
4.4.0, 4.4.0-preview1-25305-02, 4.4.0-preview2-25405-01, 4.4.14.4.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-611
    XML External Entity (XXE)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Frequently Asked Questions

What is CVE-2018-0765?
Denial of service vulnerability exists when .NET and .NET Core improperly process XML documents This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2018-0765?
CVE-2018-0765 affects System.Security.Cryptography.Xml. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-0765 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-35hc-x2cw-2j4v

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    Microsoft Security Advisory CVE-2026-33116 – .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

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    Microsoft Security Advisory CVE-2026-32203 – .NET and Visual Studio Denial of Service Vulnerability

  • CVE-2026-50525
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    Microsoft Security Advisory CVE-2026-50525 – .NET Denial of Service Vulnerability

  • CVE-2026-47302
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  • CVE-2026-47304
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    Microsoft Security Advisory CVE-2026-47304 – .NET Security Feature Bypass Vulnerability

  • CVE-2026-50527
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    Microsoft Security Advisory CVE-2026-50527 – .NET Denial of Service Vulnerability

  • CVE-2018-0764
    HIGH

    Denial of service vulnerability exists when .NET and .NET Core improperly process XML documents

  • CVE-2022-34716
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    .NET Information Disclosure Vulnerability

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