CVE-2022-34716Public exploitNetwork attack vector

Local file disclosure via XML external entities

Published Aug 9, 2022 · Updated May 29, 2025

XXE injection in Microsoft .NET and dependent Visual Studio and PowerShell releases allows remote attackers to read local files. System.Security.Cryptography.Xml.SignedXml resolves external XML entities while verifying a crafted XML signature, incorporating attacker-selected local or network resources. Exploitation requires an application to pass attacker-controlled signed XML into the vulnerable verifier; the published impact is confidentiality-only.

CVSS severity5.9
Medium
EPSS probability2.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE injection in Microsoft .NET and dependent Visual Studio and PowerShell releases allows remote attackers to read local files. System.Security.Cryptography.Xml.SignedXml resolves external XML entities while verifying a crafted XML signature, incorporating attacker-selected local or network resources. Exploitation requires an application to pass attacker-controlled signed XML into the vulnerable verifier; the published impact is confidentiality-only.

The record

CVE
CVE-2022-34716
Published
Aug 9, 2022
Updated
May 29, 2025
Vendor
Microsoft
Product
.NET 6.0
Classifications
CWE-290, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 29, 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=6.0.0 <6.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · .NET 6.0version=6.0.0 <6.0.8
Microsoft · .NET Core 3.1version=3.1 <3.1.28
Microsoft · Microsoft Visual Studio 2019 version 16.11version=16.11.0 <16.11.18
Microsoft · Microsoft Visual Studio 2022 version 17.0version=17.0.0 <17.0.13
Microsoft · Microsoft Visual Studio 2022 version 17.2version=17.2.0 <17.2.7
Microsoft · PowerShell 7.0version=7.0.0 <7.0.12
Microsoft · Microsoft Visual Studio 2017version=15.9.0 <15.9.50
Microsoft · PowerShell 7.2version=7.2.0 <7.2.6
Microsoft · Microsoft Visual Studio 2019 version 16.9version=15.0.0 <16.9.24

Published CVSS scores

5.9Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1005Data from Local System

Public exploit references

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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