Windows Installer Elevation of Privilege Vulnerability

published 2023-01-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-25709

cvss: 7.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

Patch / fix

fixed in 16

Microsoft Windows 10 Version 1507 10.0.10240.19685
Microsoft Windows 10 Version 1607 10.0.14393.5648
Microsoft Windows Server 2016 10.0.14393.5648
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.5648
Microsoft Windows 7 6.1.7601.26321
Microsoft Windows 7 Service Pack 1 6.1.7601.26321
Microsoft Windows 8.1 6.3.9600.20778
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21872
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.21872
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21872
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.26321
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.26321
Microsoft Windows Server 2012 6.2.9200.24075
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.24075
Microsoft Windows Server 2012 R2 6.3.9600.20778
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20778

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-09-30)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 Version 1507
Microsoft Windows 10 Version 1607
Microsoft Windows Server 2016
Microsoft Windows Server 2016 (Server Core installation)
Microsoft Windows 7
Microsoft Windows 7 Service Pack 1
Microsoft Windows 8.1
Microsoft Windows Server 2008 Service Pack 2
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
Microsoft Windows Server 2008 Service Pack 2
Microsoft Windows Server 2008 R2 Service Pack 1
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
Microsoft Windows Server 2012
Microsoft Windows Server 2012 (Server Core installation)
Microsoft Windows Server 2012 R2
Microsoft Windows Server 2012 R2 (Server Core installation)

Classification

Weakness

CWE-59 Improper Link Resolution Before File Access
CWE-269 Improper Privilege Management
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2023-21542
vendor-advisory

Sources

CVE List CVE-2023-21542
NVD CVE-2023-21542

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary