January 10, 2022 · Applied Cybernetics Group
CVE-2019-1458 — Microsoft Win32k
known ransomware use
Microsoft Win32k Privilege Escalation Vulnerability
- Added to KEV
2022-01-10- Federal due date
2022-07-10- Vendor
- Microsoft
- Product
- Win32k
- EPSS
- 99.5th percentile (score 0.743, as of
2026-09-16) - NVD CVSS v3.1
- 7.8 (HIGH)
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2019-1458
CISA short description
A privilege escalation vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k EoP.
Required action
Apply updates per vendor instructions.
NVD description
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'.