What is CVE-2016-4748?

CVE-2016-4748 is a medium-severity vulnerability in Apple Mac OS X, classified under CWE-254. CVSS score: 5.3/10. Published 2016-09-25.

How severe is CVE-2016-4748?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Apple Mac OS X

CVE-2016-4748

Perl in Apple OS X before 10.12 allows local users to bypass the taint-mode protection mechanism via a crafted environment variable.

Published 2016-09-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (21.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.9% 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-254

References

www.securitytracker.com/id/1036858 (vdb-entry)
lists.apple.com/archives/security-announce/2016/Sep/msg00006.html (vendor-advisory, Mailing List, Vendor Advisory)
www.securityfocus.com/bid/93055 (vdb-entry)
support.apple.com/HT207170 (Vendor Advisory)

Frequently asked questions

What is CVE-2016-4748?: CVE-2016-4748 is a medium-severity vulnerability in Apple Mac OS X, classified under CWE-254. CVSS score: 5.3/10. Published 2016-09-25.
How severe is CVE-2016-4748?: Medium severity. CVSS v3 base score is 5.3 out of 10.