The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Buffer overflow in QuickTime in Apple OS X before 10.10 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via crafted audio samples in an m4a file.
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* versions up to 10.9.5 (inclusive)