CVE-2019-0859

Microsoft Win32k privilege escalation vulnerability allows kernel-mode code execution via improper memory handling.

This CVE-2019-0859 in Microsoft Win32k enables attackers to escalate privileges and execute arbitrary kernel code by exploiting improper memory object handling. DIB organizations must ensure all Windows systems are patched, as this vulnerability was actively exploited in the wild and represents a severe, avoidable risk that could compromise endpoint security and violate compliance requirements if unpatched.

Shame score — A high-severity, actively exploited privilege escalation vulnerability in a core Windows component that was not patched promptly enough, demonstrating significant negligence in patch management and leaving systems vulnerable to widespread exploitation.