VULNERABILITY INTELLIGENCE

CVE-2017-5396

CVSS score9.8 CRITICAL

EPSS probability4.10%

CISA KEVNot currently listed

Published2018-06-11

Last modified2026-06-17

Description

A use-after-free vulnerability in the Media Decoder when working with media files when some events are fired after the media elements are freed from memory. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.