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CVE-2016-0718

32
FAUCET Score

CVE-2016-0718 is a critical buffer overflow vulnerability in the Expat XML parser, affecting numerous products including those from Apple, Canonical, Debian, Mozilla, and Python. With a CVSS score of 9.8, this flaw allows unauthenticated, network-adjacent attackers to trigger a denial of service or potentially execute arbitrary code through a specially crafted input document. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered significant community discussion and media coverage, indicating its potential impact despite its inactive status on the CISA KEV list.

Impacted Technologies

VendorProductVersion(s)CPE
< 48.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
>= 10.11.0, <= 10.11.5CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
11CPE matchmatch criteria
cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp4:*:*:*:*:*:*
1.3CPE matchmatch criteria
cpe:2.3:a:suse:studio_onsite:1.3:*:*:*:*:*:*:*
11CPE matchmatch criteria
cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
13.80%
Probability of exploitation in next 30 days
EPSS Percentile
96.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.1380 is in the 92nd percentile among its peer group of 36,833 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

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

Remediation

Patch Available

Vendor Patches (11)

oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: expat-0:2.0.1-13.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: expat-0:2.1.0-10.el7_3
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: httpd
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Directory Server 8Fixed in: expat
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xmlrpc-c
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: expat
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: compat-expat1
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6Fixed in: expat
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2Fixed in: expat
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 3Fixed in: expat

Vendor Advisories (1)

redhatCVE-2016-0718Moderate

expat: Out-of-bounds heap read on crafted input causing crash

May 17, 2016

References

lists.apple.com / archives/security-announce/2016/Jul/msg00000.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-05/msg00064.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-06/msg00006.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-06/msg00007.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-06/msg00010.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-08/msg00004.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-08/msg00029.html
Third Party Advisory
packetstormsecurity.com / files/141350/ESET-Endpoint-Antivirus-6-Remote-Code-Execution.html
Third Party AdvisoryVDB Entry
rhn.redhat.com / errata/RHSA-2016-2824.html
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2486
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
seclists.org / fulldisclosure/2017/Feb/68
Mailing ListThird Party Advisory
kc.mcafee.com / corporate/index
Third Party Advisory
security.gentoo.org / glsa/201701-21
Third Party Advisory
source.android.com / security/bulletin/2016-11-01.html
Third Party Advisory
support.apple.com / HT206903
Third Party Advisory
support.eset.com / ca6333
Third Party Advisory
tenable.com / security/tns-2016-20
Third Party Advisory
debian.org / security/2016/dsa-3582
Third Party Advisory
mozilla.org / security/announce/2016/mfsa2016-68.html
Third Party Advisory
openwall.com / lists/oss-security/2016/05/17/12
Mailing ListThird Party Advisory
oracle.com / technetwork/security-advisory/cpujul2018-4258247.html
PatchThird Party Advisory
oracle.com / technetwork/topics/security/bulletinjul2016-3090568.html
Third Party Advisory
securityfocus.com / bid/90729
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036348
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036415
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037705
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2983-1
Third Party Advisory
ubuntu.com / usn/USN-3044-1
Third Party Advisory