CVE-2021-3517
Status: ModifiedHigh (8.6)—
There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Base score: 8.6
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 17%
- Percentile among all scored CVEs: 97
- Score date: 10/1/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (28)
Debian — Debian LinuxFedoraproject — FedoraNetapp — Active IQ Unified ManagerNetapp — Clustered Data OntapNetapp — Clustered Data Ontap Antivirus ConnectorNetapp — E-series Santricity OS ControllerNetapp — E-series Santricity Storage ManagerNetapp — E-series Santricity WEB ServicesNetapp — HCI H410c FirmwareNetapp — HCI Management NodeNetapp — Manageability Software Development KITNetapp — Oncommand InsightNetapp — Oncommand Workflow AutomationNetapp — Ontap Select Deploy Administration UtilityNetapp — Santricity Unified ManagerNetapp — SnapdriveNetapp — SnapmanagerNetapp — SolidfireOracle — Communications Cloud Native Core Network Function Cloud Native EnvironmentOracle — Enterprise Manager Base PlatformOracle — Mysql WorkbenchOracle — OpenjdkOracle — Peoplesoft Enterprise PeopletoolsOracle — Real User Experience InsightOracle — ZFS Storage Appliance KITRedhat — Enterprise LinuxRedhat — Jboss Core ServicesXmlsoft — Libxml2
CWEs
- CWE-787
- CWE-787
- CWE-125
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1954232
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
- https://security.gentoo.org/glsa/202107-05
- https://security.netapp.com/advisory/ntap-20210625-0002/
- https://security.netapp.com/advisory/ntap-20211022-0004/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1954232
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
- https://security.gentoo.org/glsa/202107-05
- https://security.netapp.com/advisory/ntap-20210625-0002/
- https://security.netapp.com/advisory/ntap-20211022-0004/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
Raw JSON (NVD)
Show
{
"id": "CVE-2021-3517",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-3517",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2025-12-02T21:32:30.725398Z"
}
}
],
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 7.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"authentication": "NONE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.6,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
},
"impactScore": 4.7,
"exploitabilityScore": 3.9
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.6,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
},
"impactScore": 4.7,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "secalert@redhat.com",
"affectedData": [
{
"vendor": "n/a",
"product": "libxml2",
"versions": [
{
"status": "affected",
"version": "libxml2 2.9.11"
}
]
}
]
}
],
"published": "2021-05-19T14:15:07.553",
"references": [
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1954232",
"tags": [
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
"source": "secalert@redhat.com"
},
{
"url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E",
"source": "secalert@redhat.com"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/",
"source": "secalert@redhat.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/",
"source": "secalert@redhat.com"
},
{
"url": "https://security.gentoo.org/glsa/202107-05",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://security.netapp.com/advisory/ntap-20210625-0002/",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://security.netapp.com/advisory/ntap-20211022-0004/",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://www.oracle.com/security-alerts/cpujan2022.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://www.oracle.com/security-alerts/cpujul2022.html",
"tags": [
"Not Applicable"
],
"source": "secalert@redhat.com"
},
{
"url": "https://www.oracle.com/security-alerts/cpuoct2021.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1954232",
"tags": [
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.gentoo.org/glsa/202107-05",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.netapp.com/advisory/ntap-20210625-0002/",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.netapp.com/advisory/ntap-20211022-0004/",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.oracle.com/security-alerts/cpujan2022.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.oracle.com/security-alerts/cpujul2022.html",
"tags": [
"Not Applicable"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.oracle.com/security-alerts/cpuoct2021.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
},
{
"type": "Secondary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application."
},
{
"lang": "es",
"value": "Se presenta un fallo en la funcionalidad xml entity encoding de libxml2 en versiones anteriores a 2.9.11. Un atacante que sea capaz de proporcionar un archivo diseñado para que sea procesado por una aplicación vinculada con la funcionalidad afectada de libxml2 podría desencadenar una lectura fuera de los límites. El impacto más probable de este fallo es la disponibilidad de la aplicación, con algún impacto potencial en la confidencialidad e integridad si un atacante puede usar la información de la memoria para explotar aún más la aplicación"
}
],
"lastModified": "2026-06-17T04:05:16.597",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "208AF535-5D38-45B4-B227-2892611C5A20",
"versionEndExcluding": "2.9.11"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9B453CF7-9AA6-4B94-A003-BF7AE0B82F53"
},
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*",
"vulnerable": true,
"matchCriteriaId": "3A756737-1CC4-42C2-A4DF-E1C893B4E2D5"
},
{
"criteria": "cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*",
"vulnerable": true,
"matchCriteriaId": "B55E8D50-99B4-47EC-86F9-699B67D473CE"
},
{
"criteria": "cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1FE996B1-6951-4F85-AA58-B99A379D2163"
},
{
"criteria": "cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "62347994-1353-497C-9C4A-D5D8D95F67E8"
},
{
"criteria": "cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FF971916-C526-43A9-BD80-985BCC476569",
"versionEndIncluding": "11.70.1",
"versionStartIncluding": "11.0.0"
},
{
"criteria": "cpe:2.3:a:netapp:e-series_santricity_storage_manager:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0D9CC59D-6182-4B5E-96B5-226FCD343916"
},
{
"criteria": "cpe:2.3:a:netapp:e-series_santricity_web_services:-:*:*:*:*:web_services_proxy:*:*",
"vulnerable": true,
"matchCriteriaId": "1AEFF829-A8F2-4041-8DDF-E705DB3ADED2"
},
{
"criteria": "cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A3C19813-E823-456A-B1CE-EC0684CE1953"
},
{
"criteria": "cpe:2.3:a:netapp:manageability_software_development_kit:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D39DCAE7-494F-40B2-867F-6C6A077939DD"
},
{
"criteria": "cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F1BE6C1F-2565-4E97-92AA-16563E5660A5"
},
{
"criteria": "cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5735E553-9731-4AAC-BCFF-989377F817B3"
},
{
"criteria": "cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E7CF3019-975D-40BB-A8A4-894E62BD3797"
},
{
"criteria": "cpe:2.3:a:netapp:santricity_unified_manager:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A372B177-F740-4655-865C-31777A6E140B"
},
{
"criteria": "cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:windows:*:*",
"vulnerable": true,
"matchCriteriaId": "BEDE62C6-D571-4AF8-B85E-CBBCE4AF98B5"
},
{
"criteria": "cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:oracle:*:*",
"vulnerable": true,
"matchCriteriaId": "26A2B713-7D6D-420A-93A4-E0D983C983DF"
},
{
"criteria": "cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:sap:*:*",
"vulnerable": true,
"matchCriteriaId": "64DE38C8-94F1-4860-B045-F33928F676A8"
},
{
"criteria": "cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A6E9EF0C-AFA8-4F7B-9FDC-1E0F7C26E737"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:hci_h410c_firmware:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "08C564D8-E21F-403C-B4BB-7B14B7FB5DAE"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:hci_h410c:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "8532F5F0-00A1-4FA9-A80B-09E46D03F74F"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C2A5B24D-BDF2-423C-98EA-A40778C01A05"
},
{
"criteria": "cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D26F3E23-F1A9-45E7-9E5F-0C0A24EE3783"
},
{
"criteria": "cpe:2.3:a:oracle:enterprise_manager_base_platform:13.5.0.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6E8758C8-87D3-450A-878B-86CE8C9FC140"
},
{
"criteria": "cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EED6C8C2-F986-4CFD-A343-AD2340F850F2",
"versionEndIncluding": "8.0.26"
},
{
"criteria": "cpe:2.3:a:oracle:openjdk:8:update301:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "56F2883B-6A1B-4081-8877-07AF3A73F6CD"
},
{
"criteria": "cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D9DB4A14-2EF5-4B54-95D2-75E6CF9AA0A9"
},
{
"criteria": "cpe:2.3:a:oracle:real_user_experience_insight:13.4.1.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CADD7026-EF85-40A5-8563-7A34C6941B1F"
},
{
"criteria": "cpe:2.3:a:oracle:real_user_experience_insight:13.5.1.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "58F019E8-F68D-41B5-9480-0A81616F2E7C"
},
{
"criteria": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D3E503FB-6279-4D4A-91D8-E237ECF9D2B0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secalert@redhat.com"
}