CVE-2016-3387: Microsoft Edge

High severity, CVSS 7.5. EPSS: 19.9% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 10 and 11 and Microsoft Edge do not properly restrict access to private namespaces, which allows remote attackers to gain privileges via unspecified vectors, aka "Microsoft Browser Elevation of Privilege Vulnerability," a different vulnerability than CVE-2016-3388.

Affected products

• Microsoft Edge: affected versions not specified
• Microsoft Internet Explorer: version 10 only; version 11 only

Published 2016-10-14. Last modified 2026-06-17.