CVE-2026-100200
HighCVSS 7.0Summary
A use-after-free vulnerability in the Windows Update Service allows an authorized attacker to elevate privileges locally. The flaw resides in the system component responsible for updates.
Risk Assessment
An attacker with low privileges on the machine can exploit this flaw to gain administrative rights, potentially leading to full system compromise.
Recommendation
Immediately install the latest Windows security updates provided by Microsoft that address this vulnerability.
Other vulnerabilities in Windows Update Service
See all- CVE-2026-70142High
Untrusted search path in Windows Update Service. An authorized attacker can exploit this to elevate privileges locally.
- CVE-2026-70139High
Heap-based buffer overflow in Windows Update Service. An authorized attacker can exploit this to elevate privileges locally.
- CVE-2026-70056High
A use after free vulnerability exists in the Windows Update Service. An authorized attacker can exploit this flaw to elevate privileges locally.
- CVE-2026-100203High
Heap-based buffer overflow in Windows Update Service allows an authorized attacker to elevate privileges locally.
- CVE-2021-26866High
Elevation of privilege vulnerability in Windows Update Service. Allows an attacker to gain higher privileges on the system.
Original NVD description (English source)
Use after free in Windows Update Service allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS