CVE-2016-4642

Name: CVE-2016-4642
Creator: NVD / NIST
Published: 2019-01-11T18:29:00.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.34%

Last modified Jun 17, 2026

CVE-2016-4642 is a vulnerability of currently unknown severity. In iOS before 9.3.3, tvOS before 9.2.2, and OS X El Capitan before v10.11.6 and Security Update 2016-004, proxy authentication incorrectly reported HTTP proxies received credentials securely. This issue was addressed through improved warnings.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.

Description

In iOS before 9.3.3, tvOS before 9.2.2, and OS X El Capitan before v10.11.6 and Security Update 2016-004, proxy authentication incorrectly reported HTTP proxies received credentials securely. This issue was addressed through improved warnings.

Metrics

EPSS Probability

1.34%

67.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-254

Affected Software

Vendor	Product	Versions
Apple	Apple Tv	< 9.2.2
Apple	Iphone Os	< 9.3.3
Apple	Mac Os	>= 10.11.0, < 10.11.6

References

https://support.apple.com/HT206902Vendor Advisory
https://support.apple.com/HT206903Vendor Advisory
https://support.apple.com/HT206905Vendor Advisory
https://support.apple.com/HT206902Vendor Advisory
https://support.apple.com/HT206903Vendor Advisory
https://support.apple.com/HT206905Vendor Advisory

Timeline

Published: Jan 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-4642?

How severe is CVE-2016-4642?

Severity scoring for CVE-2016-4642 is pending analysis. The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.

How do I fix CVE-2016-4642?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-4642?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST