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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-2019-0803.
Use Microsoft vendor hub and Windows 10 1507 product page to widen CVE-2019-0859 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2025-59295, CVE-2025-64680 and CVE-2025-64679 for nearby disclosures in the same product family. Additional editorial context is available in Weekly Security Roundup: Navigating the April 2026 Threat Landscape and Critical Framework Exploits.