CVE-2018-8120Actively exploitedAdded to KEV 2022-03-15Known ransomware campaign use

Microsoft Win32k Privilege Escalation Vulnerability

Microsoft, Win32k

Description

A privilege escalation vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory.

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

Critical

73.3%

estimated chance of real-world exploitation in the next 30 days, higher than 99.5% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2022-04-05

Talk to us about this

Confirm whether this vulnerability class is actually exploitable in your environment.

Get help implementing the required action and closing the gap.

Not sure if this affects you?

We help organizations confirm real exposure and prioritize what actually needs fixing first.