CVE-2019-1388

An unpatched Windows privilege escalation flaw allowed attackers to run elevated processes, directly enabling ransomware campaigns.

CVE-2019-1388 was a critical privilege escalation vulnerability in the Windows Certificate Dialog that allowed attackers to execute processes with elevated privileges. Because it remained unpatched and was actively exploited in the wild, it served as a primary entry point for ransomware attacks, demonstrating the severe compliance and operational risks of relying on known, unpatched vendor flaws.

Shame score — Microsoft failed to patch a critical, actively exploited privilege escalation flaw for years, directly enabling widespread ransomware attacks and proving that known vulnerabilities are a severe compliance and operational liability.