CVE-2018-8126: Microsoft Internet Explorer

High severity, CVSS 8.8. EPSS: 5.6% chance of exploitation in the next 30 days.

A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka "Internet Explorer Security Feature Bypass Vulnerability." This affects Internet Explorer 11.

Affected products

• Microsoft Internet Explorer: version 11 only

Published 2018-05-09. Last modified 2026-06-17.