May 23, 2022 · Applied Cybernetics Group
CVE-2018-8589 — Microsoft Win32k
Microsoft Win32k Privilege Escalation Vulnerability
- Added to KEV
2022-05-23- Federal due date
2022-06-13- Vendor
- Microsoft
- Product
- Win32k
- EPSS
- 97.9th percentile (score 0.504, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2018-8589
CISA short description
A privilege escalation vulnerability exists when Windows improperly handles calls to Win32k.sys. An attacker who successfully exploited this vulnerability could run remote code in the security context of the local system.
Required action
Apply updates per vendor instructions.