CVE-2026-83721
HighCVSS 7.8Summary
A use after free vulnerability in Windows Win32K allows an authorized attacker to elevate privileges locally.
Risk Assessment
This flaw enables an attacker with valid credentials to escalate privileges on a Windows system, potentially resulting in full control of the workstation.
Recommendation
Immediately install security updates for Windows Win32K and enforce least privilege for local accounts.
Other vulnerabilities in Windows Win32K
See all- CVE-2026-85901High
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
- CVE-2026-83883High
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2026-83866High
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2026-83841High
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2026-83762High
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2026-83757High
Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2026-83732High
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2026-70286High
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
- CVE-2026-34347High
A use after free vulnerability in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2026-33839High
A race condition in Windows Win32K allows an authorized attacker to locally elevate privileges due to improper synchronization during concurrent execution using shared resources.
Original NVD description (English source)
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS