{"schema":"threatline.record/2","record":{"id":"CVE-2021-44228","aliases":[],"summary":"Apache Log4j2 Remote Code Execution Vulnerability","details":"Apache Log4j2 contains a vulnerability where JNDI features do not protect against attacker-controlled JNDI-related endpoints, allowing for remote code execution.","categories":["Unclassified"],"product":"Log4j2","vendor":"Apache","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-44228","source_modified_at":"2025-10-21T23:25:23.121Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Apache Log4j2","vendor":"Apache Software Foundation","versions":[{"version":"2.0-beta9","status":"affected","lessThan":"log4j-core*","versionType":"custom","changes":[{"at":"2.3.1","status":"unaffected"},{"at":"2.4","status":"affected"},{"at":"2.12.2","status":"unaffected"},{"at":"2.13.0","status":"affected"},{"at":"2.15.0","status":"unaffected"}]}],"defaultStatus":null}],"fixed_versions":[],"cvss":10,"severity":"Critical","kev":{"listed":true,"date_added":"2021-12-10","due_date":"2021-12-24","required_action":"For all affected software assets for which updates exist, the only acceptable remediation actions are: 1) Apply updates; OR 2) remove affected assets from agency networks. Temporary mitigations using one of the measures provided at https://www.cisa.gov/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.","ransomware_campaign_use":"Known"},"epss":{"probability":0.99999,"percentile":1,"score_date":"2026-10-23"},"published_at":"2021-12-10T00:00:00.000Z","modified_at":"2025-10-21T23:25:23.121Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-44228","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:25:23.121Z"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/log4shell_header_injection.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-12-09"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/log4shell_scanner.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-12-09"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/mobileiron_core_log4shell.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-12-12"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/ubiquiti_unifi_log4shell.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-12-09"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/vmware_vcenter_log4shell.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-12-09"},{"source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/51183","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2023-04-01"},{"source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/50592","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-12-14"},{"source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/50590","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-12-14"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-44228.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-44228","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA 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List","url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00007.html","tags":["mailing-list","x_transferred"]},{"source":"CVE List","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU57UJDCFIASIO35GC55JMKSRXJMCDFM/","tags":["vendor-advisory","x_transferred"]},{"source":"CVE List","url":"https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/","tags":["vendor-advisory","x_transferred"]},{"source":"CVE List","url":"https://www.kb.cert.org/vuls/id/930724","tags":["third-party-advisory","x_transferred"]},{"source":"CVE List","url":"https://twitter.com/kurtseifried/status/1469345530182455296","tags":["x_transferred"]},{"source":"CVE List","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html","tags":["x_transferred"]},{"source":"CVE 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Injection","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/log4shell_header_injection.rb","date":"2021-12-09","added":"2026-03-11","check":true},{"source":"Metasploit","kind":"Auxiliary module","name":"Log4Shell HTTP Scanner","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/log4shell_scanner.rb","date":"2021-12-09","added":"2022-04-06","check":false},{"source":"Metasploit","kind":"Exploit module","name":"MobileIron Core Unauthenticated JNDI Injection RCE (via Log4Shell)","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/mobileiron_core_log4shell.rb","date":"2021-12-12","added":"2026-04-22","check":true},{"source":"Metasploit","kind":"Exploit module","name":"UniFi Network Application Unauthenticated JNDI Injection RCE (via 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Information Disclosure","url":"https://www.exploit-db.com/exploits/50590","date":"2021-12-14","added":"2021-12-14","verified":false},{"source":"Nuclei","kind":"Scanner template","name":"Apache Log4j2 Remote Code Injection","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-44228.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2025-10-21T23:25:23.121Z","content_hash":"fe32944df7fa39ed84ae465805aee89ae08cd67cec4ff0b86b43677f5fa748f2"}}