What is CVE-2016-4649?

CVE-2016-4649 is a medium-severity vulnerability in Apple Mac OS X, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2016-07-22.

How severe is CVE-2016-4649?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Apple Mac OS X

CVE-2016-4649

Audio in Apple OS X before 10.11.6 allows local users to cause a denial of service (NULL pointer dereference) via unspecified vectors.

Published 2016-07-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Apple Mac OS X

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.securityfocus.com/bid/91824 (vdb-entry)
lists.apple.com/archives/security-announce/2016/Jul/msg00000.html (vendor-advisory, Mailing List, Vendor Advisory)
www.securitytracker.com/id/1036348 (vdb-entry)
support.apple.com/HT206903 (Vendor Advisory)

Frequently asked questions

What is CVE-2016-4649?: CVE-2016-4649 is a medium-severity vulnerability in Apple Mac OS X, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2016-07-22.
How severe is CVE-2016-4649?: Medium severity. CVSS v3 base score is 5.5 out of 10.