What is CVE-2016-7581?

CVE-2016-7581 is a medium-severity vulnerability in Apple Iphone OS, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2017-02-20.

How severe is CVE-2016-7581?

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

Improper input validation in Apple Iphone OS

CVE-2016-7581

An issue was discovered in certain Apple products. iOS before 10.1 is affected. The issue involves the "Safari" component, which allows remote web servers to cause a denial of service via a crafted URL.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-02-20 · 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:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.009 (56.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Apple Iphone OS

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support.apple.com/HT207271 (Vendor Advisory)
www.securityfocus.com/bid/94432 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2016-7581?: CVE-2016-7581 is a medium-severity vulnerability in Apple Iphone OS, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2017-02-20.
How severe is CVE-2016-7581?: Medium severity. CVSS v3 base score is 4.3 out of 10.