Windows iSCSI
CVE-2023-21803 — Windows iSCSI Discovery Service Remote Code Execution Vulnerability
Executive Summary
None
Overview
9.8
CVSS CRITICAL
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.5
EPSS Score
0.01765
probability of exploitation in the next 30 days
0.75159 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
6 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 5022858 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 5022838 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 5022840 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 20H2 for 32-bit Systems | 5022834 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 21H2 for 32-bit Systems | 5022834 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 22H2 for 32-bit Systems | 5022834 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
4 patches
| Article | Type | Restart |
|---|---|---|
5022858 |
Security Update | Yes |
5022838 |
Security Update | Yes |
5022840 |
Security Update | Yes |
5022834 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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