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No exploitation reportedFix available

CVE-2021-26221

No exploitation reported by the sources we read.

  • Published2021-02-08
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2021-02-0821:15CVE publishedNVD

Versions per branch

NVD
Ezxml project ezxml
BranchAffectedFixed in
0.8≤ 0.8.6no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mapcacheUbuntu:16.04:LTSall versions · no fixed version listed
  • mapcacheDebian:14all versions · no fixed version listed
  • netcdfUbuntu:22.04:LTSall versions · no fixed version listedand 3 other packages
  • netcdfUbuntu:20.04:LTSall versions · no fixed version listedand 3 other packages
  • netcdfopenSUSE:Leap 15.3all versions · fixed in 4.6.1-5.7.1and 1 other package
  • netcdfopenSUSE:Leap 15.3all versions · fixed in 4.7.4-4.3.2and 9 other packages
  • netcdfMageia:8all versions · fixed in 4.7.4-3.1.mga8
  • netcdfDebian:14all versions · fixed in 1:4.9.0-1and 1 other package

21 more package ranges on OSV.dev

Vendor advisories

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Published
2021-02-08
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-gg7q-8hj5-8hp8

Frequently asked questions

What is CVE-2021-26221?

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.

Is CVE-2021-26221 actively exploited?

Active exploitation of CVE-2021-26221 has not been confirmed. Its EPSS score was 1.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-26221?

CVE-2021-26221 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.

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Sources for this record