CVE-2026-83499
HighCVSS 7.8Summary
Insufficient granularity of access control in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
Risk Assessment
An attacker could exploit overly broad access permissions to the service, potentially leading to privilege escalation and unauthorized system changes.
Recommendation
Install the latest Windows security updates and review access control configuration for Windows Server Update Service.
Other vulnerabilities in Windows Server Update Service
See all- CVE-2026-81969High
Insufficient granularity of access control in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
- CVE-2026-105009High
Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
- CVE-2025-59287CriticalActively exploited
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
- CVE-2026-50444High
Missing authentication for a critical function in Windows Server Update Service (WSUS) allows an authorized attacker to elevate privileges over a network.
- CVE-2026-50328High
An unhandled exception in Windows Server Update Service (WSUS) allows an unauthorized attacker to perform tampering over a network. This vulnerability could compromise the integrity of updates.
- CVE-2026-20856High
Improper input validation in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
Original NVD description (English source)
Insufficient granularity of access control in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS