CVE-2021-26222: The ezxml_new function in ezXML 0.8.6 and earlier is vulnerable to OOB write when opening XML file after exhau

Q: How do I fix CVE-2021-26222?

ezxml: upgrade to newer than 0.8.6. Exact commands for each OS are on this page.

Q: Is CVE-2021-26222 being exploited?

CVE-2021-26222 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-26222 affect?

CVE-2021-26222 affects ezxml. Severity is high (CVSS 8.1). The ezxml_new function in ezXML 0.8.6 and earlier is vulnerable to OOB write when opening XML file after exhausting the memory pool.

Q: How urgent is CVE-2021-26222?

Priority 50/100. High severity; Public exploit reference

This month

HIGH 8.1UPGRADE

CVE-2021-26222 is a high-severity flaw (CVSS 8.1) affecting ezxml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The ezxml_new function in ezXML 0.8.6 and earlier is vulnerable to OOB write when opening XML file after exhausting the memory pool.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-787
Published	2021-02-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ezxml project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-02-08 21:15 UTCPublished CVE record published
2026-06-17 03:42 UTCUpdated Record last modified

ezxml project ezxml UPGRADE

Affected: <= 0.8.6

Fixed in: newer than 0.8.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ezxml || rpm -q ezxml || ezxml --version

2. UPGRADE to newer than 0.8.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ezxml

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ezxml

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-26222?

ezxml: upgrade to newer than 0.8.6. Exact commands for each OS are on this page.

Is CVE-2021-26222 being exploited?

CVE-2021-26222 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-26222 affect?

CVE-2021-26222 affects ezxml. Severity is high (CVSS 8.1). The ezxml_new function in ezXML 0.8.6 and earlier is vulnerable to OOB write when opening XML file after exhausting the memory pool.

How urgent is CVE-2021-26222?

Priority 50/100. High severity; Public exploit reference

Related CVEs

CVE-2022-30045 MEDIUM 6.5 DOWNGRADE An issue was discovered in libezxml.a in ezXML 0.8.6
CVE-2021-31598 HIGH 7.5 DOWNGRADE MITIGATE An issue was discovered in libezxml.a in ezXML 0.8.6
CVE-2021-31348 MEDIUM 6.5 DOWNGRADE MITIGATE An issue was discovered in libezxml.a in ezXML 0.8.6
CVE-2021-31347 MEDIUM 6.5 DOWNGRADE MITIGATE An issue was discovered in libezxml.a in ezXML 0.8.6
CVE-2021-31229 MEDIUM 6.5 DOWNGRADE MITIGATE An issue was discovered in libezxml.a in ezXML 0.8.6

References

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