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CVE-2023-21803

Windows - iSCSI Discovery Service

Microsoft CVSS 9.8 Updated March 18, 2026

Executive Risk Summary

"A remote code execution vulnerability exists in the Windows iSCSI Discovery Service, which could allow an attacker to execute arbitrary code on the target system. This vulnerability is considered critical and should be patched as soon as possible to prevent potential attacks."

Operational Audit Arsenal

Target Type Service
Target Asset iscsidsc.dll
Standard Path %windir%\System32
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: iscsidsc.dll (Service)
$Targets = 'iscsidsc.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

Moderate

Internal Work Notes

Apply Microsoft patch for CVE-2023-21803 to prevent remote code execution vulnerability in Windows iSCSI Discovery Service

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Intelligence Sources

Related Microsoft Threats

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