CVE-2021-26862
HighCVSS 7.0Exploitation Probability (EPSS)
Elevated risk66th percentile - higher than 66% of all known CVEs
Summary
Elevation of privilege vulnerability in Windows Installer. An attacker could exploit it to gain elevated privileges on the system.
Risk Assessment
Risk of privilege escalation and system takeover.
Recommendation
Install the latest Windows security updates.
Other vulnerabilities in Windows Installer
See all- CVE-2026-96308High
Use-after-free vulnerability in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-96307High
Use-after-free vulnerability in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-96305High
Use-after-free vulnerability in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-96302High
Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-88124High
Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-88080High
Use after free vulnerability in Windows Installer. An authorized attacker can elevate privileges locally.
- CVE-2026-88076High
Null pointer dereference vulnerability in Windows Installer. An authorized attacker can elevate privileges locally.
- CVE-2026-87715High
Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-87711High
Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
- CVE-2026-87708High
Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Windows Installer Elevation of Privilege Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS