CVE-2026-70139
HighCVSS 7.8Summary
Heap-based buffer overflow in Windows Update Service. An authorized attacker can exploit this to elevate privileges locally.
Risk Assessment
An attacker with local access could elevate privileges, potentially leading to full host compromise and lateral movement.
Recommendation
Apply the Windows security updates as soon as possible and monitor for unusual update service activity.
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-2026-70056High
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-2026-100200High
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.
- 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)
Heap-based buffer overflow in Windows Update Service allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS