CVE-2019-11700: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 1.4% chance of exploitation in the next 30 days.

A hyperlink using the res: protocol can be used to open local files at a known location in Internet Explorer if a user approves execution when prompted. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 67.

Affected products

• Mozilla Firefox: before 67.0 (fixed in 67.0)

Published 2019-07-23. Last modified 2026-06-17.