CVE-2021-33765
MediumCVSS 6.2Exploitation Probability (EPSS)
Low risk47th percentile - higher than 47% of all known CVEs
Summary
A vulnerability in Windows Installer allows spoofing. An attacker could exploit this flaw to impersonate a trusted source.
Risk Assessment
The risk is the potential to deceive users or systems, which could lead to the installation of malicious software.
Recommendation
It is recommended to apply Windows security updates to eliminate this vulnerability.
Other vulnerabilities in Windows Installer
See all- CVE-2014-1814High
The vulnerability in Windows Installer allows local users to gain elevated privileges via a crafted application that invokes the repair feature for a different application.
- CVE-2024-38014HighActively exploited
Elevation of privilege vulnerability in Windows Installer. An attacker could exploit it to gain elevated privileges.
- CVE-2020-0683HighActively exploited
An elevation of privilege vulnerability exists in the Windows Installer when MSI packages process symbolic links, known as 'Windows Installer Elevation of Privilege Vulnerability'.
- CVE-2026-77894High
A race condition in Windows Installer due to improper synchronization of shared resources allows an authorized attacker to elevate privileges locally.
- CVE-2026-72929High
Improper validation of integrity check value in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-71339Medium
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-69441High
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-62694High
Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-70347High
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-70346High
Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Windows Installer Spoofing Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS