CVE-2023-29331Network attack vector

Service interruption via X.509 certificate processing

Published Jun 14, 2023 · Updated Feb 28, 2025

Denial of service in Microsoft .NET, .NET Framework, Visual Studio, and PowerShell allows remote attackers to interrupt applications. The affected X.509 certificate-processing path consumes resources incorrectly, but Microsoft has not disclosed the responsible function or malformed certificate property. Exploitation requires an application to process attacker-supplied certificate data; confidentiality and integrity impacts are not reported.

CVSS severity7.5
High
EPSS probability2.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Microsoft .NET, .NET Framework, Visual Studio, and PowerShell allows remote attackers to interrupt applications. The affected X.509 certificate-processing path consumes resources incorrectly, but Microsoft has not disclosed the responsible function or malformed certificate property. Exploitation requires an application to process attacker-supplied certificate data; confidentiality and integrity impacts are not reported.

The record

CVE
CVE-2023-29331
Published
Jun 14, 2023
Updated
Feb 28, 2025
Vendor
Microsoft
Product
Microsoft .NET Framework 3.5 and 4.8.1
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.8.1 <4.8.9166.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft .NET Framework 3.5 and 4.8.1version=4.8.1 <4.8.9166.0
Microsoft · .NET 6.0version=6.0.0 <6.0.18
Microsoft · Microsoft .NET Framework 3.5 and 4.6.2version=4.7.0 <10.0.10240.19983
Microsoft · PowerShell 7.3version=7.3.0 <7.3.5
Microsoft · Microsoft .NET Framework 3.5 and 4.8version=4.8.0 <4.8.4644.0
Microsoft · Microsoft Visual Studio 2022 version 17.6version=17.6.0 <17.6.3
Microsoft · Microsoft Visual Studio 2022 version 17.4version=17.4.0 <17.4.8
Microsoft · Microsoft Visual Studio 2022 version 17.0version=17.0.0 <17.0.22
Microsoft · Microsoft .NET Framework 2.0 Service Pack 2version=2.0.0 <3.0.6920.8954; 2.0.50727.8970
Microsoft · Microsoft .NET Framework 3.0 Service Pack 2version=3.0.0 <3.0.6920.8954; 2.0.50727.8970
Microsoft · Microsoft Visual Studio 2022 version 17.2version=17.2.0 <17.2.16
Microsoft · Microsoft .NET Framework 3.5.1version=3.5.0 <3.0.6920.8954; 2.0.50727.8970
Microsoft · .NET 7.0version=7.0.0 <7.0.7
Microsoft · Microsoft .NET Framework 3.5 and 4.7.2version=4.7.0 <4.7.4050.0
Microsoft · Microsoft .NET Frameworkversion=3.0.0.0 <10.0.14393.5989; version=4.7.0 <4.7.04043.0
Microsoft · PowerShell 7.2version=7.2.0 <7.2.12
Microsoft · Microsoft .NET Framework 4.6.2version=4.7.0 <4.7.04043.0
Microsoft · Microsoft .NET Framework 3.5version=3.5.0 <3.0.6920.8954; 2.0.50727.8970
Microsoft · Microsoft .NET Framework 4.8version=4.8.0 <4.8.4644.0

Published CVSS scores

7.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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