HOMEVULNERABILITIESCVE-2021-23926
CRITICAL

CVE-2021-23926

CWE-776Published: January 14, 2021· Updated: Jun 17, 2026

9.1
CVSS v3.1

Official Description

The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from malicious XML input. Vulnerabilities include possibilities for XML Entity Expansion attacks. Affects XMLBeans up to and including v2.6.0.

NVD Source

Technical Analysis

CVE-2021-23926 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected Vendors & Products

Apache1 product(s)
xmlbeans
Debian1 product(s)
debian linux
netapp3 product(s)
oncommand unified manager core packagesnap creator frameworksnapmanager
Oracle2 product(s)
middleware common libraries and toolspeoplesoft enterprise peopletools
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html
PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html
ADVISORYhttps://issues.apache.org/jira/browse/XMLBEANS-517
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/06/msg00024.html
ADVISORYhttps://poi.apache.org/
ADVISORYhttps://security.netapp.com/advisory/ntap-20210513-0004/
ADVISORYhttps://issues.apache.org/jira/browse/XMLBEANS-517
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/06/msg00024.html
ADVISORYhttps://poi.apache.org/
ADVISORYhttps://security.netapp.com/advisory/ntap-20210513-0004/

All References (16)

→
https://issues.apache.org/jira/browse/XMLBEANS-517Issue Tracking · Vendor Advisory
→
https://lists.apache.org/thread.html/r2dc5588009dc9f0310b7382269f932cc96cae4c3901b747dda1a7fed%40%3Cjava-dev.axis.apache.org%3E
→
https://lists.apache.org/thread.html/rbb01d10512098894cd5f22325588197532c64f1c818ea7e4120d40c1%40%3Cjava-dev.axis.apache.org%3E
→
https://lists.debian.org/debian-lts-announce/2021/06/msg00024.htmlMailing List · Third Party Advisory
→
https://poi.apache.org/Product · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210513-0004/Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch · Third Party Advisory
→
https://issues.apache.org/jira/browse/XMLBEANS-517Issue Tracking · Vendor Advisory
→
https://lists.apache.org/thread.html/r2dc5588009dc9f0310b7382269f932cc96cae4c3901b747dda1a7fed%40%3Cjava-dev.axis.apache.org%3E
→
https://lists.apache.org/thread.html/rbb01d10512098894cd5f22325588197532c64f1c818ea7e4120d40c1%40%3Cjava-dev.axis.apache.org%3E
→
https://lists.debian.org/debian-lts-announce/2021/06/msg00024.htmlMailing List · Third Party Advisory
→
https://poi.apache.org/Product · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210513-0004/Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch · Third Party Advisory

Quick Facts

CVE IDCVE-2021-23926
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-776
CISA KEVNo
Affected4 vendor(s)
PublishedJan 14, 2021

Related CVEs (CWE-776)

CVE-2019-19144
9.8
CVE-2014-2228
9.8
CVE-2013-4335
9.8
CVE-2020-24590
9.1
CVE-2024-28982
8.2
CVE-2019-5427
7.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-23926 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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