Critical9.8Microsoft Server

Critical [CVE-2023-21803] Windows iSCSI Discovery Service Remote Code Execution Vulnerability

This critical-severity Microsoft Server advisory covers CVE-2023-21803 affecting Windows Server 2008 Service Pack 2 (Server Core installation).

CVE-2023-21803 Published Feb 14, 2023Updated by vendor Aug 19, 2026

CVE-2023-21803

Affected products & platforms

Microsoft ServerWindows Server

Open vendor advisory

Android app · Google Play

Monitor future Microsoft Server CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

Summary

Windows iSCSI Discovery Service Remote Code Execution Vulnerability

Affected products named by the advisory: Windows Server 2008 Service Pack 2; Windows Server 2008 Service Pack 2 (Server Core installation).

Affected versions

Windows 10 Version 1507 10.0.10240.0 before 10.0.10240.19747
Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.5717
Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.4010
Windows 10 Version 20H2 10.0.0 before 10.0.19042.2604
Windows 10 Version 21H2 10.0.19043.0 before 10.0.19044.2604
Windows 10 Version 22H2 10.0.19045.0 before 10.0.19045.2604
Windows Server 2008 Service Pack 2 6.0.6003.0 before 6.0.6003.21915
Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 before 6.0.6003.21915

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions

10.0.10240.19747
10.0.14393.5717
10.0.17763.4010
10.0.19042.2604
10.0.19044.2604
10.0.19045.2604
6.0.6003.21915

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 10.0.10240.19747, 10.0.14393.5717, 10.0.17763.4010, 10.0.19042.2604, 10.0.19044.2604, 10.0.19045.2604. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.