CVE-2016-4609

Name: CVE-2016-4609
Creator: NVD / NIST
Published: 2016-07-22T02:59:32.977+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 5.10%

Last modified Jun 17, 2026

CVE-2016-4609 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on Windows, tvOS before 9.2.2, and watchOS before 2.2.2 allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, a different vulnerability than CVE-2016-4607, CVE-2016-4608, CVE-2016-4610, and CVE-2016-4612.. EPSS estimates a 5.10% chance of exploitation in the next 30 days.

Description

libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on Windows, tvOS before 9.2.2, and watchOS before 2.2.2 allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, a different vulnerability than CVE-2016-4607, CVE-2016-4608, CVE-2016-4610, and CVE-2016-4612.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

5.10%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Xmlsoft	Libxslt	< 1.1.29
Apple	Iphone Os	< 9.3.3
Apple	Mac Os X	< 10.11.6
Apple	Tvos	< 9.2.2
Apple	Watchos	< 2.2.2
Apple	Icloud	< 5.2.1
Apple	Itunes	< 12.4.2
Fedoraproject	Fedora	30
Debian	Debian Linux	8.0

References

http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.htmlMailing List, Vendor Advisory
http://www.securityfocus.com/bid/91826Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036348Third Party Advisory, VDB Entry
https://lists.debian.org/debian-lts-announce/2019/07/msg00020.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SK4YNISS22MJY22YX5I6V2U63QZAUEHA/
https://support.apple.com/HT206899Vendor Advisory
https://support.apple.com/HT206901Vendor Advisory
https://support.apple.com/HT206902Vendor Advisory
https://support.apple.com/HT206903Vendor Advisory
https://support.apple.com/HT206904Vendor Advisory
https://support.apple.com/HT206905Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.htmlMailing List, Vendor Advisory
http://www.securityfocus.com/bid/91826Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036348Third Party Advisory, VDB Entry
https://lists.debian.org/debian-lts-announce/2019/07/msg00020.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SK4YNISS22MJY22YX5I6V2U63QZAUEHA/
https://support.apple.com/HT206899Vendor Advisory
https://support.apple.com/HT206901Vendor Advisory
https://support.apple.com/HT206902Vendor Advisory
https://support.apple.com/HT206903Vendor Advisory
https://support.apple.com/HT206904Vendor Advisory
https://support.apple.com/HT206905Vendor Advisory

Timeline

Published: Jul 22, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-4609?

How severe is CVE-2016-4609?

CVE-2016-4609 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.10% probability of exploitation in the next 30 days.

How do I fix CVE-2016-4609?

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-2016-4609?

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

Scan your code now

Source: NVD / NIST