CVE-2026-70286
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk35th percentile - higher than 35% of all known CVEs
Summary
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Risk Assessment
An attacker with system access could gain higher privileges, potentially leading to full system compromise.
Recommendation
Install the latest Windows security updates.
Other vulnerabilities in Windows Win32K
See all- 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.
- CVE-2026-24285High
A use after free vulnerability in Windows Win32K allows an authorized attacker to elevate privileges locally.
- CVE-2025-30388High
CVE-2025-30388 involves a heap-based buffer overflow in the Win32K driver in Windows, allowing an unauthorized attacker to execute code locally.
- CVE-2022-41109High
Vulnerability in Windows Win32k allows elevation of privilege. It could be exploited to gain higher privileges on the system.
- CVE-2022-21882HighActively exploited
Win32k Elevation of Privilege Vulnerability.
- CVE-2021-26863High
Elevation of Privilege vulnerability in Windows Win32k. Details are not provided in the description.
- CVE-2021-1732HighActively exploited
A vulnerability in the Win32k component of Windows allows elevation of privilege. An attacker could exploit it to gain higher privileges on the system.
- CVE-2019-1458HighActively exploited
A vulnerability in Windows when the Win32k component fails to properly handle objects in memory allows elevation of privilege.
- CVE-2019-1132HighActively exploited
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.
Original NVD description (English source)
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS