Is CVE-2016-4616 in the CISA KEV catalog?

No. CVE-2016-4616 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-4616?

CVE-2016-4616 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2016-4616?

CVE-2016-4616 has an EPSS score of 3.21% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-4616?

Upgrade iCloud (Legacy) to 5.2.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2016-4616

CRITICALEPSS 87th pctl

9.8

CVSS v3

NVD

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-2016-4614, CVE-2016-4615, and CVE-2016-4619.

CWE-119Buffer Overflow

How to fix

Remediation Available

iCloud (Legacy)Windows application

Affected:5.2.1Fixed in:5.2.1Apple Inc.

iTunesWindows application

Affected:12.4.2Fixed in:12.4.2Apple Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.21%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Vendor Advisory11

Third-Party Advisory2

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.