Is CVE-2021-46143 actively exploited?

CVE-2021-46143 has no public evidence of in-the-wild exploitation as of 2025-05-05.

What is the CVSS score for CVE-2021-46143?

CVE-2021-46143 has a CVSS score of 8.1 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-46143?

Patch guidance is available from libexpat project security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-46143.

Fix CVE-2021-46143 - HIGH libexpat project libexpat

Q: Which products are affected by CVE-2021-46143?

11 products: libexpat project libexpat, netapp active iq unified manager, netapp clustered data ontap, netapp hci baseboard management controller, netapp hci baseboard management controller, and 6 more.

Description

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

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-190 · Integer Overflow CWE-190 · Integer Overflow

Metadata

Primary Vendor: LIBEXPAT_PROJECT
Published: 1/6/2022
Last Modified: 5/5/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

libexpat_project : libexpatnetapp : active_iq_unified_managernetapp : clustered_data_ontapnetapp : hci_baseboard_management_controllernetapp : hci_baseboard_management_controllernetapp : hci_baseboard_management_controllernetapp : oncommand_workflow_automationnetapp : solidfire_\&_hci_management_nodetenable : nessustenable : nessussiemens : sinema_remote_connect_server

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-46143. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-46143

View on NIST NVD

CVE-2021-46143 vulnerability