Windows iSCSI Discovery Service Remote Code Execution Vulnerability

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Summary

CVECVE-2023-21803
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-02-14 20:15:15 UTC
Updated2026-08-19 17:18:16 UTC
DescriptionWindows iSCSI Discovery Service Remote Code Execution Vulnerability

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.017650000 probability, percentile 0.762530000 (date 2026-08-19)

Problem Types: CWE-190 | NVD-CWE-noinfo | CWE-190 CWE-190: Integer Overflow or Wraparound

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Microsoft Windows 10 All All All All
Operating System Microsoft Windows 10 1607 All All All All
Operating System Microsoft Windows 10 1809 All All All All
Operating System Microsoft Windows 10 20h2 All All All All
Operating System Microsoft Windows 10 21h2 All All All All
Operating System Microsoft Windows 10 22h2 All All All All
Operating System Microsoft Windows Server 2008 - sp2 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Windows 10 Version 1507 affected 10.0.10240.0 10.0.10240.19747 custom 32-bit Systems
CNA Microsoft Windows 10 Version 1607 affected 10.0.14393.0 10.0.14393.5717 custom 32-bit Systems
CNA Microsoft Windows 10 Version 1809 affected 10.0.17763.0 10.0.17763.4010 custom 32-bit Systems
CNA Microsoft Windows 10 Version 20H2 affected 10.0.0 10.0.19042.2604 custom 32-bit Systems
CNA Microsoft Windows 10 Version 21H2 affected 10.0.19043.0 10.0.19044.2604 custom 32-bit Systems
CNA Microsoft Windows 10 Version 22H2 affected 10.0.19045.0 10.0.19045.2604 custom 32-bit Systems
CNA Microsoft Windows Server 2008 Service Pack 2 affected 6.0.6003.0 6.0.6003.21915 custom 32-bit Systems
CNA Microsoft Windows Server 2008 Service Pack 2 Server Core Installation affected 6.0.6003.0 6.0.6003.21915 custom 32-bit Systems

References

ReferenceSourceLinkTags
Security Update Guide - Microsoft Security Response Center af854a3a-2127-422b-91ae-364da2661108 msrc.microsoft.com Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 91979 Microsoft Windows Security Update for February 2023

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