VULNERABILITY INTELLIGENCE

CVE-2016-5254

CVSS score9.8 CRITICAL
EPSS probability2.95%
CISA KEVNot currently listed
Published2016-08-05
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Use-after-free vulnerability in the nsXULPopupManager::KeyDown function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by leveraging keyboard access to use the Alt key during selection of top-level menu items.

Weakness classification

  • CWE-416: Use After Free

Primary references