CVE-2018-4400: Input Validation

Published Oct 30, 2018
·
Updated

Security. A validation issue was addressed with improved logic.

Other sources

A validation issue was addressed with improved logic. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, watchOS 5.1.

Credit

Yukinobu Nagayasu(LAC Co), Ltd., Yukinobu Nagayasu(LAC Co), Ltd., Yukinobu Nagayasu(LAC Co), Ltd.

Affected Software

8 affected componentsFixes available
Apple macOS Mojave<10.14.1
10.14.1
Apple High Sierra
Apple Sierra
Apple WatchOS<5.1
5.1
Apple iOS<12.1
12.1
Apple iPhone OS<12.1
Apple iOS and macOS<10.14.1
Apple WatchOS<5.1

Event History

Apr 3, 2019
CVE Published
via MITRE·05:43 PM
Data Sourced
via MITRE·05:43 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2018-4400?

The severity of CVE-2018-4400 is medium with a severity value of 5.5.

2

What software versions are affected by CVE-2018-4400?

Versions prior to iOS 12.1, macOS Mojave 10.14.1, and watchOS 5.1 are affected by CVE-2018-4400.

3

How can I fix CVE-2018-4400?

To fix CVE-2018-4400, update to iOS 12.1 or later, macOS Mojave 10.14.1 or later, and watchOS 5.1 or later.

4

Where can I find more information about CVE-2018-4400?

You can find more information about CVE-2018-4400 on the Apple support page: [link](https://support.apple.com/en-us/HT209193)

5

What is the Common Weakness Enumeration (CWE) for CVE-2018-4400?

The Common Weakness Enumeration (CWE) for CVE-2018-4400 is CWE-20.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203