Is CVE-2016-4658 in the CISA KEV catalog?

No. CVE-2016-4658 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-4658?

CVE-2016-4658 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2016-4658?

CVE-2016-4658 has an EPSS score of 8.63% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-4658?

Upgrade libxml2 on debian 11 to 2.9.4+dfsg1-2.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2016-4658

CRITICALEPSS 94th pctl

9.8

CVSS v3

NVD

Description

xpointer.c in libxml2 before 2.9.5 (as used in Apple iOS before 10, OS X before 10.12, tvOS before 10, and watchOS before 3, and other products) does not forbid namespace nodes in XPointer ranges, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and memory corruption) via a crafted XML document.

CWE-119Buffer Overflow

How to fix

Remediation Available

libxml2Debian

Fixed in:2.9.4+dfsg1-2.1CVE-2016-4658

libxml2Ubuntu

Fixed in:2.9.1+dfsg1-3ubuntu4.9USN-3235-1

Fixed in:2.9.3+dfsg1-1ubuntu0.2USN-3235-1

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

8.63%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Patch1

git.gnome.org

Vendor Advisory8

Third-Party Advisory4

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.