CVE-2019-0543VulnerabilityPublished 03/15/2022Updated 10/24/2026
CVE-2019-0543: Microsoft Windows Privilege Escalation Vulnerability
Affects Microsoft WindowsSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 03/15/2022
- KEV deadline
- 04/05/2022
- Ransomware
- Used in ransomware campaigns
- EPSS
- 4.7% chance of exploitation in 30 days – higher than 91% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
CVE-2019-0543 is a privilege escalation vulnerability in Microsoft Windows where improper handling of authentication requests allows an attacker to run processes with elevated privileges. This vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns. No specific affected Windows versions are provided in the available data.