CVE-2023-35622Network attack vector

Unauthenticated DNS response spoofing

Published Dec 12, 2023 · Updated May 22, 2025

DNS spoofing in affected Microsoft Windows Server releases allows remote attackers to compromise the integrity of DNS responses. Microsoft has not disclosed the affected DNS component or the incorrect operation performed on untrusted network input. Network access without authentication is sufficient, and successful exploitation can cause clients to accept falsified DNS data.

CVSS severity7.5
High
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DNS spoofing in affected Microsoft Windows Server releases allows remote attackers to compromise the integrity of DNS responses. Microsoft has not disclosed the affected DNS component or the incorrect operation performed on untrusted network input. Network access without authentication is sufficient, and successful exploitation can cause clients to accept falsified DNS data.

The record

CVE
CVE-2023-35622
Published
Dec 12, 2023
Updated
May 22, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-290
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 12, 2023CVE publishedPublication date reported by the CVE source.
  2. May 22, 2025Record 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=10.0.17763.0 <10.0.17763.5206

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.5206
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.6529
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.24614
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.24614
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.584
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.6529
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26864
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.26864
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.21715
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.5206
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.22413
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2159
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.21715
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.22413

Published CVSS scores

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

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing

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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