CVE-2022-26814Network attack vector

Remote code execution via DNS race condition

Published Apr 15, 2022 · Updated Jan 2, 2025

Race condition in Microsoft Windows DNS Server allows remote authenticated users to execute code via unspecified network vectors. Microsoft has not published the shared resource, erroneous synchronization operation, or concurrency sequence that triggers the flaw. Exploitation requires high privileges against a host running the DNS Server role and grants code execution in that server context.

CVSS severity6.6
Medium
EPSS probability1.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Microsoft Windows DNS Server allows remote authenticated users to execute code via unspecified network vectors. Microsoft has not published the shared resource, erroneous synchronization operation, or concurrency sequence that triggers the flaw. Exploitation requires high privileges against a host running the DNS Server role and grants code execution in that server context.

The record

CVE
CVE-2022-26814
Published
Apr 15, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-362, T1210
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 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 <10.0.17763.2803

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.2803
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.5066
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5066
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.20337
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.2803
Microsoft · Windows Server version 20H2version=10.0.0 <10.0.19042.1645
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.643
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.20337

Published CVSS scores

6.6Microsoft CorporationCVSS: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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