CRITICAL 9.8 Microsoft

CVE-2023-21803

Windows iSCSI Discovery Service Remote Code Execution Vulnerability

Microsoft Security Update 2023-Feb: Windows iSCSI Discovery Service Remote Code Execution Vulnerability

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows 10 for 32-bit Systems
Windows 10 Version 1607 for 32-bit Systems
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)

References

Published: 2023-02-14 · Source: Microsoft · Feed updated: 2026-08-20

This critical severity vulnerability with a CVSS score of 9.8 was published on 2023-02-14 via Microsoft. Affected: Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 20H2 for 32-bit Systems, Windows 10 Version 21H2 for 32-bit Systems and 5 more.

Risk Timeline

CVE Disclosed2023-02-14 · 1283 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21803

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2023-21803

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2021-26867	Windows Hyper-V Remote Code Execution Vulnerability	CRITICAL	9.9
CVE-2026-57092	Microsoft Windows VMSwitch Elevation of Privilege Vulnerability	CRITICAL	9.9
CVE-2021-26877	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2021-26893	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2021-26894	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2021-26895	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8

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