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Case File

CVE-2016-5254

CRITICAL · CVSS 9.8 EPSS 2.95%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2016-08-05 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It affects Firefox. It may lead to a denial-of-service condition.

CVE
CVE-2016-5254
Severity
CRITICAL
CVSS
9.8
EPSS
2.95%
Firefox

Original NVD 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.