CVE-2022-34724Network attack vector

Remote DNS service interruption via undisclosed flaw

Published Sep 13, 2022 · Updated Mar 11, 2025

Denial of service in Microsoft Windows DNS Server allows remote attackers to interrupt DNS service via network requests. Microsoft has not published the affected DNS Server code path or how untrusted network input triggers the failure. Exploitation requires a reachable Windows server running the DNS Server role and affects availability without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability3.70%
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 Windows DNS Server allows remote attackers to interrupt DNS service via network requests. Microsoft has not published the affected DNS Server code path or how untrusted network input triggers the failure. Exploitation requires a reachable Windows server running the DNS Server role and affects availability without reported data disclosure or modification.

The record

CVE
CVE-2022-34724
Published
Sep 13, 2022
Updated
Mar 11, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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=10.0.17763.0 <10.0.17763.3406

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.3406
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.5356
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.23865
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.23865
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5356
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26115
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.26115
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.20571
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.3406
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.21666
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1006
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.20571
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.21666

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

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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