What is CVE-2016-1770?

CVE-2016-1770 is a medium-severity vulnerability in Apple Mac OS X, classified under Improper Access Control. CVSS score: 6.5/10. Published 2016-03-24.

How severe is CVE-2016-1770?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Apple Mac OS X

CVE-2016-1770

The Reminders component in Apple OS X before 10.11.4 allows attackers to bypass an intended user-confirmation requirement and trigger a dialing action via a tel: URL.

Published 2016-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Apple Mac OS X

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

lists.apple.com/archives/security-announce/2016/Mar/msg00004.html (vendor-advisory, Vendor Advisory)
support.apple.com/HT206167 (Vendor Advisory)
www.securitytracker.com/id/1035363 (vdb-entry)

Frequently asked questions

What is CVE-2016-1770?: CVE-2016-1770 is a medium-severity vulnerability in Apple Mac OS X, classified under Improper Access Control. CVSS score: 6.5/10. Published 2016-03-24.
How severe is CVE-2016-1770?: Medium severity. CVSS v3 base score is 6.5 out of 10.