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CVE-2016-4616

31
FAUCET Score

CVE-2016-4616 is a critical memory corruption vulnerability in libxml2, affecting multiple Apple products including iOS, OS X, iTunes, iCloud, tvOS, and watchOS. With a CVSS score of 9.8, it presents a severe risk of denial of service and potentially other unspecified impacts, requiring no user interaction and allowing remote exploitation over the network. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.3.3CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
< 10.11.6CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
< 9.2.2CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
< 2.2.2CPE matchmatch criteria
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
< 5.2.1CPE matchmatch criteria
cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.21%
Probability of exploitation in next 30 days
EPSS Percentile
86.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0321 is in the 79th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

lists.apple.com / archives/security-announce/2016/Jul/msg00000.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00001.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00002.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00003.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00005.html
Mailing ListVendor Advisory
support.apple.com / HT206899
Vendor Advisory
support.apple.com / HT206901
Vendor Advisory
support.apple.com / HT206902
Vendor Advisory
support.apple.com / HT206903
Vendor Advisory
support.apple.com / HT206904
Vendor Advisory
support.apple.com / HT206905
Vendor Advisory
securityfocus.com / bid/91826
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036348
Third Party AdvisoryVDB Entry