CVE-2025-33075: Windows Installer Elevation of Privilege Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-10 · updated 2026-06-17
Weakness: CWE-59

Description

Improper link resolution before file access ('link following') in Windows Installer allows an authorized attacker to elevate privileges locally.

Affected products

Microsoft Windows 10 Version 1507: before 10.0.10240.21034 — fixed in 10.0.10240.21034
Microsoft Windows 10 1607: before 10.0.14393.8148 — fixed in 10.0.14393.8148
Microsoft Windows 10: before 10.0.17763.7434 — fixed in 10.0.17763.7434
Microsoft Windows 10: before 10.0.19044.5965 — fixed in 10.0.19044.5965
Microsoft Windows 10: before 10.0.19045.5965 — fixed in 10.0.19045.5965
Microsoft Windows 11: before 10.0.22621.5472 — fixed in 10.0.22621.5472
Microsoft Windows 11: before 10.0.22631.5472 — fixed in 10.0.22631.5472
Microsoft Windows 11: before 10.0.26100.4270 — fixed in 10.0.26100.4270
Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.8148 — fixed in 10.0.14393.8148
Microsoft Windows Server 2019: before 10.0.17763.7434 — fixed in 10.0.17763.7434
Microsoft Windows Server 2022: before 10.0.20348.3745 — fixed in 10.0.20348.3745
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1665 — fixed in 10.0.25398.1665
Microsoft Windows Server 2025: before 10.0.26100.4270 — fixed in 10.0.26100.4270
Microsoft Windows 10 Version 1507: from 10.0.10240.0 before 10.0.10240.21034 — fixed in 10.0.10240.21034
Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.8148 — fixed in 10.0.14393.8148
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.7434 — fixed in 10.0.17763.7434
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.5965 — fixed in 10.0.19044.5965
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.5965 — fixed in 10.0.19045.5965
Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.5472 — fixed in 10.0.22621.5472
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.5472 — fixed in 10.0.22631.5472
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.5472 — fixed in 10.0.22631.5472
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.4349 — fixed in 10.0.26100.4349
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.27769 — fixed in 6.1.7601.27769
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.23351 — fixed in 6.0.6003.23351
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.25522 — fixed in 6.2.9200.25522
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22620 — fixed in 6.3.9600.22620
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8148 — fixed in 10.0.14393.8148
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7434 — fixed in 10.0.17763.7434

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.21034; Microsoft Windows 10 1607 10.0.14393.8148; Microsoft Windows 10 10.0.17763.7434; Microsoft Windows 10 10.0.19044.5965; Microsoft Windows 10 10.0.19045.5965; Microsoft Windows 11 10.0.22621.5472; Microsoft Windows 11 10.0.22631.5472; Microsoft Windows 11 10.0.26100.4270; Microsoft Windows Server 2016 10.0.14393.8148; Microsoft Windows Server 2019 10.0.17763.7434; Microsoft Windows Server 2022 10.0.20348.3745; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1665. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33075

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