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Vulnerabilities

Vulnerability · CVE-2021-3541

A flaw was found in libxml2.

Published Jul 9, 2021 · catalog updated Oct 14, 2026 · A flaw was found

Check if you run it

No confirmed exploitation is on record for CVE-2021-3541. EPSS is 2.07%. Act only if a listed version of A flaw was found is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A flaw was found).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.07%
Remediation
Advisory link
Affected products
cpe netapp/active iq unified manager · cpe netapp/cloud backup · cpe netapp/clustered data ontap · cpe netapp/clustered data ontap antivirus connector · cpe netapp/h300s firmware · cpe netapp/h410c firmware

A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe netapp/active iq unified managerversion unspecified
  • cpe netapp/cloud backupversion unspecified
  • cpe netapp/clustered data ontapversion unspecified
  • cpe netapp/clustered data ontap antivirus connectorversion unspecified
  • cpe netapp/h300s firmwareversion unspecified
  • cpe netapp/h410c firmwareversion unspecified
  • cpe netapp/h500s firmwareversion unspecified
  • cpe netapp/h700s firmwareversion unspecified
  • cpe netapp/manageability software development kitversion unspecified
  • cpe oracle/zfs storage appliance kit8.8
  • cpe redhat/jboss core servicesversion unspecified
  • cpe xmlsoft/libxml2version unspecified

How to fix CVE-2021-3541

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-3541. EPSS is 2.07%. Act only if a listed version of A flaw was found is installed.

Which versions are affected?

Compare what you have installed with oracle/zfs storage appliance kit 8.8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-776. EPSS 2.07%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 9, 2021 · NIST NVD

    Detected

    A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

  2. Oct 14, 2026 · NIST NVD

    Updated

    A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

Sources

  • CVE.orgVulnerability recordCVE-2021-3541

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-3541

    30-day exploitation probability 2.1%

    first.org
  • NIST NVDVulnerability recordCVE-2021-3541

    A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.