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CVE-2016-2099

34
FAUCET Score

CVE-2016-2099 is a critical use-after-free vulnerability in Apache Xerces C++ versions 3.1.3 and earlier, impacting products like Apache and openSUSE. An unauthenticated attacker can exploit this remotely with low complexity by providing an XML document containing an invalid character, leading to complete compromise of confidentiality, integrity, and availability. Despite its critical CVSS score of 9.8, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.1.3CPE matchmatch criteria
cpe:2.3:a:apache:xerces-c\+\+:*:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

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
6.78%
Probability of exploitation in next 30 days
EPSS Percentile
93.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0678 is in the 88th percentile among its peer group of 36,829 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 (5)

redhatend of lifevia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: xerces-c
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xerces-c
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: xerces-c
redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: xerces-c
redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 3Fixed in: xerces-c

Vendor Advisories (1)

redhatCVE-2016-2099Moderate

xerces-c: Use-after-free in heap on specially crafted XML input

May 9, 2016

References

lists.opensuse.org / opensuse-updates/2016-07/msg00016.html
lists.opensuse.org / opensuse-updates/2016-07/msg00053.html
lists.opensuse.org / opensuse-updates/2016-09/msg00013.html
issues.apache.org / jira/browse/XERCESC-2066
security.gentoo.org / glsa/201612-46
debian.org / security/2016/dsa-3579
openwall.com / lists/oss-security/2016/05/09/7
oracle.com / technetwork/security-advisory/cpujul2018-4258247.html
securityfocus.com / bid/90502