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CVE-2024-21342

Windows - DNS Client

Microsoft CVSS 7.5 Updated March 14, 2026

Executive Risk Summary

"A denial of service vulnerability exists in the Windows DNS client, which could allow an attacker to cause a denial of service condition. This vulnerability can be exploited by sending a specially crafted DNS response to a vulnerable system."

Operational Audit Arsenal

Target Type Executable
Target Asset dnsapi.dll
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: dnsapi.dll (Executable)
$Targets = 'dnsapi.dll'
$SearchPaths = @("$env:windir\System32", "$env:ProgramFiles", "${env:ProgramFiles(x86)}")

Get-ChildItem -Path $SearchPaths -Include $Targets -Recurse -ErrorAction SilentlyContinue | 
Select-Object FullName, @{Name="Version";Expression={$_.VersionInfo.ProductVersion}}

Patch Impact Forecast

Reboot Required Likely

DNS resolution services may be affected

Internal Work Notes

Apply latest Windows security updates to mitigate potential DNS client denial of service vulnerability

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Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.