No exploitation reportedFix available

CVE-2016-4614

Q: Is CVE-2016-4614 actively exploited?

Active exploitation of CVE-2016-4614 has not been confirmed. Its EPSS score was 3.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2016-4614?

CVE-2016-4614 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2016-07-22
Fixed in5.2.1
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

libxml2 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-2016-4615, CVE-2016-4616, and CVE-2016-4619.

Timeline

dates in UTC

2016-07-2202:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-4614?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-4614?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apple icloudversion to verify

Branch	Affected	Fixed in	Source
5.2	< 5.2.1	5.2.1	NVD

Apple iphone os

Branch	Affected	Fixed in	Source
9.3	< 9.3.3	9.3.3	NVD

Apple itunesversion to verify

Branch	Affected	Fixed in	Source
12.4	< 12.4.2	12.4.2	NVD

3 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apple icloud to 5.2.1

Advisories and patches

lists.apple.comVendor Advisory
lists.apple.comVendor Advisory
lists.apple.comVendor Advisory
lists.apple.comVendor Advisory
lists.apple.comVendor Advisory
support.apple.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score3.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2016-07-22
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-4614?

Is CVE-2016-4614 actively exploited?

Active exploitation of CVE-2016-4614 has not been confirmed. Its EPSS score was 3.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-4614?

CVE-2016-4614 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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