CVE-2016-4763

Name: CVE-2016-4763
Creator: NVD / NIST
Published: 2016-09-25T10:59:57.16+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.20%

Last modified Jun 17, 2026

CVE-2016-4763 is a vulnerability of currently unknown severity. WKWebView in WebKit in Apple iOS before 10, iTunes before 12.5.1 on Windows, and Safari before 10 does not properly verify X.509 certificates from HTTPS servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

WKWebView in WebKit in Apple iOS before 10, iTunes before 12.5.1 on Windows, and Safari before 10 does not properly verify X.509 certificates from HTTPS servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Metrics

EPSS Probability

1.20%

64.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-310

Affected Software

Vendor	Product	Versions
Apple	Itunes	<= 12.4.3
Apple	Safari	<= 9.1.3
Apple	Iphone Os	<= 9.3.5

References

http://lists.apple.com/archives/security-announce/2016/Sep/msg00007.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00012.htmlMailing List, Vendor Advisory
http://www.securityfocus.com/bid/93066
http://www.securitytracker.com/id/1036854
https://support.apple.com/HT207143Vendor Advisory
https://support.apple.com/HT207157Vendor Advisory
https://support.apple.com/HT207158Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00007.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00012.htmlMailing List, Vendor Advisory
http://www.securityfocus.com/bid/93066
http://www.securitytracker.com/id/1036854
https://support.apple.com/HT207143Vendor Advisory
https://support.apple.com/HT207157Vendor Advisory
https://support.apple.com/HT207158Vendor Advisory

Timeline

Published: Sep 25, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-4763?

How severe is CVE-2016-4763?

Severity scoring for CVE-2016-4763 is pending analysis. The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2016-4763?

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-2016-4763?

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

Scan your code now

Source: NVD / NIST