ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2021-46143

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

Published Jan 6, 2022 · catalog updated Oct 14, 2026 · libexpat project

Check if you run it

No confirmed exploitation is on record for CVE-2021-46143. EPSS is 4.22%. Act only if a listed version of libexpat project is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
4.22%
Remediation
Advisory link
Affected products
cpe libexpat project/libexpat · cpe netapp/active iq unified manager · cpe netapp/clustered data ontap · cpe netapp/hci baseboard management controller · cpe netapp/oncommand workflow automation · cpe netapp/solidfire & hci management node

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

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 libexpat project/libexpatversion unspecified
  • cpe netapp/active iq unified managerversion unspecified
  • cpe netapp/clustered data ontapversion unspecified
  • cpe netapp/hci baseboard management controllerh610c
  • cpe netapp/hci baseboard management controllerh610s
  • cpe netapp/hci baseboard management controllerh615c
  • cpe netapp/oncommand workflow automationversion unspecified
  • cpe netapp/solidfire & hci management nodeversion unspecified
  • cpe siemens/sinema remote connect serverversion unspecified
  • cpe tenable/nessusversion unspecified

How to fix CVE-2021-46143

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-2021-46143. EPSS is 4.22%. Act only if a listed version of libexpat project is installed.

Which versions are affected?

Compare what you have installed with netapp/hci baseboard management controller h610c; netapp/hci baseboard management controller h610s; netapp/hci baseboard management controller h615c. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-190: Integer Overflow. EPSS 4.22%. 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.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 6, 2022 · NIST NVD

    Detected

    In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

  2. Oct 14, 2026 · NIST NVD

    Updated

    In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

Sources

  • CVE.orgVulnerability recordCVE-2021-46143

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-46143

    30-day exploitation probability 4.2%

    first.org
  • NIST NVDVulnerability recordCVE-2021-46143

    In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

    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.