CVE-2023-35346Network attack vector

Authenticated code execution via undisclosed DNS flaw

Published Jul 11, 2023 · Updated Jan 1, 2025

A race condition in Microsoft Windows DNS Server allows remote authenticated users to execute code through crafted DNS traffic. Microsoft has not published the affected function, shared resource, or incorrect synchronization operation. Exploitation requires the DNS Server role and high privileges; successful attacks execute code on the server.

CVSS severity6.6
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Microsoft Windows DNS Server allows remote authenticated users to execute code through crafted DNS traffic. Microsoft has not published the affected function, shared resource, or incorrect synchronization operation. Exploitation requires the DNS Server role and high privileges; successful attacks execute code on the server.

The record

CVE
CVE-2023-35346
Published
Jul 11, 2023
Updated
Jan 1, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-362, CWE-591, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 1, 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 <10.0.17763.4645

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.4645
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.6085
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.24374
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.24374
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.6085
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26623
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.26623
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.21063
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.4645
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.22175
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1850
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.21063
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.22175

Published CVSS scores

6.6MicrosoftCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-591Sensitive Data Storage in Improperly Locked Memory
T1210Exploitation of Remote Services

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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