CVE-2009-0956: Apple Quicktime

High severity, CVSS 9.3. EPSS: 5.1% chance of exploitation in the next 30 days.

Apple QuickTime before 7.6.2 does not properly initialize memory before use in handling movie files, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a movie containing a user data atom of size zero.

Affected products

• Apple Quicktime: up to and including 7.6.1; affected versions not specified; version 3.0 only; version 4.1.2 only; version 5.0 only; version 5.0.1 only; …

Published 2009-06-02. Last modified 2026-06-16.