CVE-2022-24464Network attack vector

Service interruption via HTTP form request parsing

Published Mar 9, 2022 · Updated May 27, 2026

Denial of service in Microsoft .NET 3.1, 5.0, and 6.0 allows remote attackers to interrupt service via crafted HTTP form requests. The affected HTTP form parser processes certain request forms incorrectly, but Microsoft has not published the exact parser routine or erroneous operation. Exposure requires an application to parse the affected form-request type; the documented consequence is an availability-only service interruption.

CVSS severity7.5
High
EPSS probability3.55%
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 3.1, 5.0, and 6.0 allows remote attackers to interrupt service via crafted HTTP form requests. The affected HTTP form parser processes certain request forms incorrectly, but Microsoft has not published the exact parser routine or erroneous operation. Exposure requires an application to parse the affected form-request type; the documented consequence is an availability-only service interruption.

The record

CVE
CVE-2022-24464
Published
Mar 9, 2022
Updated
May 27, 2026
Vendor
Microsoft
Product
Microsoft Visual Studio 2019
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=15.0.0 <16.9.18
  2. Affected versionversion=16.0.0 <16.7.26
  3. Affected versionversion=16.11.0 <16.11.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Visual Studio 2019version=15.0.0 <16.9.18; version=16.0.0 <16.7.26; version=16.11.0 <16.11.11
Microsoft · .NET 6.0version=6.0.0 <6.0.3
Microsoft · .NET Core 3.1version=3.1 <3.1.23
Microsoft · Microsoft Visual Studio 2022 version 17.0version=17.0.0 <17.0.7
Microsoft · .NET 5.0version=5.0.0 <5.0.15

Published CVSS scores

7.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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

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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