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Windows Server Update Service

CVE-2023-35317 — Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.01817 2023-07 archive

Executive Summary

None

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Jul 11 2023
Last Updated Jul 11 2023
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01817 — 0.7589 percentile
NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8

EPSS Score

0.01817
probability of exploitation in the next 30 days
0.7589 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

6 affected products
Product KB Article Severity Impact Restart Required
Windows Server 2012 5028232 (Monthly Rollup) 5028233 (Security Only) Important Elevation of Privilege 5027283 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.24374 Yes None Windows Server 2012 (Server Core installation) 5028232 (Monthly Rollup) 5028233 (Security Only) Important Elevation of Privilege 5027283 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.24374 Yes None Windows Server 2012 R2 5028228 (Monthly Rollup) 5028223 (Security Only) Important Elevation of Privilege 5027271 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.21063 6.3.9600.21075 Yes None Windows Server 2012 R2 (Server Core installation) 5028228 (Monthly Rollup) 5028223 (Security Only) Important Elevation of Privilege 5027271 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.21063 6.3.9600.21075 Yes None Windows Server 2016 5028169 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 5028169 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 5028168 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 5028168 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 5028171 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 (Server Core installation) 5028171 (Security Update) Important Elevation of Privilege Yes

Patches

3 patches
Article Type Restart
5028169 Security Update Yes
5028168 Security Update Yes
5028171 Security Update Yes

Known Exploits

Acknowledgments

l1k3beef

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