What is CVE-2016-4605?

CVE-2016-4605 is a medium-severity vulnerability in Apple Iphone OS, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2016-07-22.

How severe is CVE-2016-4605?

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

NULL pointer dereference in Apple Iphone OS

CVE-2016-4605

Calendar in Apple iOS before 9.3.3 allows remote attackers to cause a denial of service (NULL pointer dereference and device restart) via a crafted invitation.

Published 2016-07-22 · 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:N/A:H.

EPSS exploit prediction

EPSS: 0.019 (79.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Apple Iphone OS

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.securitytracker.com/id/1036344 (vdb-entry)
lists.apple.com/archives/security-announce/2016/Jul/msg00001.html (vendor-advisory, Mailing List)
www.securityfocus.com/bid/91825 (vdb-entry)
support.apple.com/HT206902 (Vendor Advisory)

Frequently asked questions

What is CVE-2016-4605?: CVE-2016-4605 is a medium-severity vulnerability in Apple Iphone OS, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2016-07-22.
How severe is CVE-2016-4605?: Medium severity. CVSS v3 base score is 6.5 out of 10.