CVE-2016-3321: Microsoft Internet Explorer

Low severity, CVSS 2.5. EPSS: 36.1% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 10 and 11 load different files for attempts to open a file:// URL depending on whether the file exists, which allows local users to enumerate files via vectors involving a file:// URL and an HTML5 sandbox iframe, aka "Internet Explorer Information Disclosure Vulnerability."

Affected products

• Microsoft Internet Explorer: version 10 only; version 11 only

Published 2016-08-09. Last modified 2026-06-17.