CVE-2022-26814
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedWindows DNS Server Remote Code Execution Vulnerability
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a remote code execution vulnerability in Windows DNS Server. An unauthenticated attacker could send specially crafted DNS queries to a vulnerable Windows DNS server to execute arbitrary code. The vulnerability affects Windows DNS Server components and requires immediate patching.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= r2all versions= 20h2all versionsall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Windows Server versionRun 'winver' or 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"' from command prompt to determine the installed Windows Server version.Affected if The version matches Windows Server 2012 R2, Server 2016, Server 2019, or Server 2022.
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Confirm DNS Server role is installedRun 'Get-WindowsFeature -Name DNS' in PowerShell (with admin rights) or check via Server Manager > Add Roles and Features > DNS Server role is listed as Installed.Affected if The DNS Server role shows as Installed.
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Verify DNS Server service is runningRun 'Get-Service -Name DNS' or 'sc query DNS' from command prompt to check if the DNS Server service (named "DNS Server") is in Running state.Affected if The DNS Server service is installed and running.
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Check DNS Server listening configurationRun 'Get-DnsServer' cmdlet in PowerShell or inspect DNS Manager console to see if the DNS server is configured to listen on external interfaces. Check network binding configuration.Affected if The DNS Server is configured to accept queries from network clients, especially if bound to external/internet-facing IP addresses.
A system is affected if it runs a vulnerable Windows Server version (2012 R2, 2016, 2019, or 2022) with the DNS Server role installed and the service running and accessible to network clients.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the Microsoft security updates for CVE-2022-26814 to all affected Windows DNS servers. Prioritize internet-facing DNS servers given the remote attack vector.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-26814 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-26814 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data