What is CVE-2016-1781?

CVE-2016-1781 is a medium-severity vulnerability in Apple Iphone OS, classified under CWE-19. CVSS score: 4.3/10. Published 2016-03-24.

How severe is CVE-2016-1781?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Apple Iphone OS

CVE-2016-1781

WebKit in Apple iOS before 9.3 and Safari before 9.1 mishandles attachment URLs, which makes it easier for remote web servers to track users via unspecified vectors.

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

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-19

References

support.apple.com/HT205635 (Vendor Advisory)
www.securitytracker.com/id/1035353 (vdb-entry)
www.securityfocus.com/archive/1/537948/100/0/threaded (mailing-list)
lists.apple.com/archives/security-announce/2015/Dec/msg00003.html (vendor-advisory, Vendor Advisory)
lists.apple.com/archives/security-announce/2015/Dec/msg00000.html (vendor-advisory, Vendor Advisory)
support.apple.com/HT205639 (Vendor Advisory)

Frequently asked questions

What is CVE-2016-1781?: CVE-2016-1781 is a medium-severity vulnerability in Apple Iphone OS, classified under CWE-19. CVSS score: 4.3/10. Published 2016-03-24.
How severe is CVE-2016-1781?: Medium severity. CVSS v3 base score is 4.3 out of 10.