{"cve":"CVE-2021-44228","nvd":{"published":"2021-12-10T10:15:09.143","modified":"2026-08-11T19:33:44.513","status":"Analyzed","description":"Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10.0},"cwes":["CWE-20","CWE-400","CWE-502","CWE-917"],"references":["http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html","http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html","http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html","http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html","http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html"],"products":["apache:log4j","apple:xcode","bentley:synchro","bentley:synchro_4d","cisco:advanced_malware_protection_virtual_private_cloud_appliance","cisco:automated_subsea_tuning","cisco:broadworks","cisco:business_process_automation","cisco:cloud_connect","cisco:cloudcenter","cisco:cloudcenter_cost_optimizer","cisco:cloudcenter_suite","cisco:cloudcenter_suite_admin","cisco:cloudcenter_workload_manager","cisco:common_services_platform_collector","cisco:connected_mobile_experiences","cisco:contact_center_domain_manager","cisco:contact_center_management_portal","cisco:crosswork_data_gateway","cisco:crosswork_network_automation","cisco:crosswork_network_controller","cisco:crosswork_optimization_engine","cisco:crosswork_platform_infrastructure","cisco:crosswork_zero_touch_provisioning","cisco:customer_experience_cloud_agent","cisco:cx_cloud_agent","cisco:cyber_vision","cisco:cyber_vision_sensor_management_extension","cisco:data_center_network_manager","cisco:dna_center","cisco:dna_spaces","cisco:dna_spaces\\","cisco:dna_spaces_connector","cisco:emergency_responder","cisco:enterprise_chat_and_email","cisco:evolved_programmable_network_manager","cisco:finesse","cisco:fog_director","cisco:fxos","cisco:identity_services_engine","cisco:integrated_management_controller_supervisor","cisco:intersight_virtual_appliance","cisco:iot_operations_dashboard","cisco:mobility_services_engine","cisco:network_assurance_engine","cisco:network_dashboard_fabric_controller","cisco:network_insights_for_data_center","cisco:network_services_orchestrator","cisco:nexus_dashboard","cisco:nexus_insights"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-44228","score":0.99999,"percentile":1.0,"date":"2026-11-01"},"kev":{"cve":"CVE-2021-44228","date_added":"2021-12-10","due_date":"2021-12-24","vendor":"Apache","product":"Log4j2","known_ransomware":true},"osv":[{"id":"GHSA-jfh8-c2jp-5v3q","url":"https://osv.dev/vulnerability/GHSA-jfh8-c2jp-5v3q","summary":"Remote code injection in Log4j","modified":"2025-10-22T19:37:02.616807Z","packages":[{"ecosystem":"Maven","name":"org.apache.logging.log4j:log4j-core","purl":"pkg:maven/org.apache.logging.log4j/log4j-core","ranges":[">=2.13.0 <2.15.0"],"fixed":["2.15.0"]},{"ecosystem":"Maven","name":"org.apache.logging.log4j:log4j-core","purl":"pkg:maven/org.apache.logging.log4j/log4j-core","ranges":[">=2.0-beta9 <2.3.1"],"fixed":["2.3.1"]},{"ecosystem":"Maven","name":"org.apache.logging.log4j:log4j-core","purl":"pkg:maven/org.apache.logging.log4j/log4j-core","ranges":[">=2.4 <2.12.2"],"fixed":["2.12.2"]},{"ecosystem":"Maven","name":"com.guicedee.services:log4j-core","purl":"pkg:maven/com.guicedee.services/log4j-core","ranges":["<=1.2.1.2-jre17"],"fixed":[]},{"ecosystem":"Maven","name":"org.xbib.elasticsearch:log4j","purl":"pkg:maven/org.xbib.elasticsearch/log4j","ranges":["6.3.2.1"],"fixed":[]},{"ecosystem":"Maven","name":"uk.co.nichesolutions.logging.log4j:log4j-core","purl":"pkg:maven/uk.co.nichesolutions.logging.log4j/log4j-core","ranges":["2.6.3-CUSTOM"],"fixed":[]},{"ecosystem":"Maven","name":"org.ops4j.pax.logging:pax-logging-log4j2","purl":"pkg:maven/org.ops4j.pax.logging/pax-logging-log4j2","ranges":[">=1.8.0 <1.9.2"],"fixed":["1.9.2"]},{"ecosystem":"Maven","name":"org.ops4j.pax.logging:pax-logging-log4j2","purl":"pkg:maven/org.ops4j.pax.logging/pax-logging-log4j2","ranges":[">=1.10.0 <1.10.8"],"fixed":["1.10.8"]},{"ecosystem":"Maven","name":"org.ops4j.pax.logging:pax-logging-log4j2","purl":"pkg:maven/org.ops4j.pax.logging/pax-logging-log4j2","ranges":[">=1.11.0 <1.11.10"],"fixed":["1.11.10"]},{"ecosystem":"Maven","name":"org.ops4j.pax.logging:pax-logging-log4j2","purl":"pkg:maven/org.ops4j.pax.logging/pax-logging-log4j2","ranges":[">=2.0.0 <2.0.11"],"fixed":["2.0.11"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}