Actively exploited in the wild
Microsoft Win32k Privilege Escalation Vulnerability
Microsoft - Win32k · Listed in the CISA KEV since 2021-11-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2019-0803
HighCVSS 7.8KEVSummary
An elevation of privilege vulnerability in Windows, caused by improper handling of objects in memory by the Win32k component. A local attacker could exploit this to gain elevated privileges.
Risk Assessment
An attacker with local access could gain higher privileges, potentially leading to full system compromise.
Recommendation
Apply Windows security updates to fix this vulnerability.
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)
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'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0859.