CVE-2019-1458VulnerabilityPublished 01/10/2022Updated 10/24/2026
CVE-2019-1458: Microsoft Win32k Privilege Escalation Vulnerability
Affects Microsoft Win32kSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 01/10/2022
- KEV deadline
- 07/10/2022
- Ransomware
- Used in ransomware campaigns
- EPSS
- 74.4% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
CVE-2019-1458 is a high-severity privilege escalation vulnerability in the Microsoft Windows Win32k component. It arises from improper handling of objects in memory, allowing attackers to elevate privileges. This vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns. No specific affected versions or patch information is provided in the available data.