{"id":"CVE-2021-46143","title":"In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.","summary":"In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-190","CWE-190"],"vendor":"libexpat_project","product":"libexpat","affected":["libexpat < 2.4.3","active_iq_unified_manager","clustered_data_ontap","hci_baseboard_management_controller = h610c","hci_baseboard_management_controller = h610s","hci_baseboard_management_controller = h615c","oncommand_workflow_automation","solidfire_&_hci_management_node","nessus < 8.15.3","nessus >= 10.0.0, < 10.1.1","sinema_remote_connect_server < 3.1"],"patched":["libexpat 2.4.3","nessus 10.1.1","sinema_remote_connect_server 3.1"],"published":"2022-01-06","updated":"2026-10-14","sourceUpdated":"2026-10-14T13:17:12.400","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-46143","references":[{"url":"http://www.openwall.com/lists/oss-security/2022/01/17/3","label":"cve@mitre.org"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf","label":"cve@mitre.org"},{"url":"https://github.com/libexpat/libexpat/issues/532","label":"cve@mitre.org"},{"url":"https://github.com/libexpat/libexpat/pull/538","label":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/202209-24","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20220121-0006/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5073","label":"cve@mitre.org"},{"url":"https://www.tenable.com/security/tns-2022-05","label":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2022/01/17/3","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/libexpat/libexpat/issues/532","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/libexpat/libexpat/pull/538","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202209-24","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20220121-0006/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5073","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/tns-2022-05","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-484086.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","exploit-available"],"epss":0.0379,"epssPercentile":0.89754,"exploits":{"github":1,"githubRepos":["https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2021-46143"],"checkedAt":"2026-10-14T13:31:34.728Z"},"exploitAvailable":true,"ingestedAt":"2026-10-14T13:30:58.408Z","slug":"CVE-2021-46143","body":"## Overview\n\nIn doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.\n\n## Affected\n\n- `libexpat < 2.4.3`\n- `active_iq_unified_manager`\n- `clustered_data_ontap`\n- `hci_baseboard_management_controller = h610c`\n- `hci_baseboard_management_controller = h610s`\n- `hci_baseboard_management_controller = h615c`\n- `oncommand_workflow_automation`\n- `solidfire_&_hci_management_node`\n- `nessus < 8.15.3`\n- `nessus >= 10.0.0, < 10.1.1`\n- `sinema_remote_connect_server < 3.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `libexpat 2.4.3`\n- `nessus 10.1.1`\n- `sinema_remote_connect_server 3.1`","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":44.6,"likelihood":0.8,"exploitation":12,"ransomware":0},"changes":[]}