Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Microsoft Microsoft .NET Framework 3.5 affected
Version Status Constraints
3.5.0 affected < 2.0.50727.9188 AND 3.0.30729.9171
Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 affected
Version Status Constraints
3.0.0.0 affected < 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 affected
Version Status Constraints
4.7.0 affected < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
Microsoft Microsoft .NET Framework 3.5 AND 4.8 affected
Version Status Constraints
4.8.0 affected < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
Microsoft Microsoft .NET Framework 3.5 AND 4.8.1 affected
Version Status Constraints
4.8.1 affected < 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 affected
Version Status Constraints
4.7.0 affected < 4.7.4150.0
Microsoft Microsoft .NET Framework 4.8 affected
Version Status Constraints
4.8.0 affected < 4.8.4811.0
Microsoft Microsoft .NET Framework 4.8.1 affected
Version Status Constraints
4.8.0.0 affected < 4.8.9363.0
Microsoft System.Security.Cryptography.Xml affected
Version Status Constraints
10.0.0 affected < 10.0.13

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Microsoft Subscribe
.net Subscribe
.net Framework Subscribe
System.security.cryptography.xml Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r955-8q5j-3h83 Microsoft Security Advisory CVE-2026-96958 - .NET and Visual Studio Denial of Service Vulnerability
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96958 cve-icon cve-icon
History

Tue, 13 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
Title .NET Denial of Service Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft .net Framework
Microsoft system.security.cryptography.xml
Weaknesses CWE-407
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:system.security.cryptography.xml:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft .net Framework
Microsoft system.security.cryptography.xml
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-13T20:37:34.610Z

Reserved: 2026-09-23T20:35:19.929Z

Link: CVE-2026-96958

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T19:22:08.387

Modified: 2026-10-13T20:19:33.493

Link: CVE-2026-96958

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses