# Log4Shell (CVE-2021-44228) Log4Shell, with CVSS v3.1 10.0, four CWEs, a CISA KEV entry with known ransomware use and an EPSS score of 0.99999. Source: https://docs.deepinfo.com/reference/vulnerability/detail/examples/cve-2021-44228/ Last updated: 2026-09-24 --- `GET https://api.deepinfo.com/v1/discovery/vulnerability-detail?cve=CVE-2021-44228` Log4Shell, with CVSS v3.1 10.0, four CWEs, a CISA KEV entry with known ransomware use and an EPSS score of 0.99999. Example 4 of 7 in **Well-Known CVEs** · [Vulnerability Detail Examples](/reference/vulnerability/detail/examples/) · endpoint: [Detail](/reference/vulnerability/detail/) Tags: `param` `cve` · `value` `CVE-2021-44228` Asks for `CVE-2021-44228`, the Apache Log4j2 JNDI lookup flaw. ## What to Notice - `metrics.cvss_metric_v31` has the maximum score, 10.0, with `scope` `CHANGED`. - `weaknesses` lists CWE-20, CWE-400, CWE-502 and CWE-917; `enrichment.cwe` adds each CWE's name and description and, where the CWE catalog has them, its OWASP Top 10 category and CAPEC patterns. - `enrichment.epss_score.epss` is 0.99999, and `enrichment.cisa_kev.date_added` is 2021-12-10, the day the CVE was published. - `enrichment.cpe` starts with Siemens firmware: the record lists the affected products of other vendors too, not only Log4j itself. ## Request | Parameter | In | Value | |---|---|---| | `cve` | query | `CVE-2021-44228` | ```bash curl 'https://api.deepinfo.com/v1/discovery/vulnerability-detail?cve=CVE-2021-44228' \ -H 'apikey: YOUR_API_KEY' \ -H 'Accept: application/json' ``` ## Response ### 200 · OK > Shortened for this page: references: 10 of 103 shown; configurations: 10 of 20 shown; configurations[].nodes[].cpe_match: first 10 items; enrichment.cpe: first 10 items; enrichment.cwe[].capec_id: first 10 items `Content-Type: application/json` · `ratelimit-limit: 1` · `ratelimit-remaining: 0` · `ratelimit-reset: 1` · `x-ratelimit-limit-second: 1` · `x-ratelimit-remaining-second: 0` · `deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a` ```json { "id": "CVE-2021-44228", "source_identifier": "user@apache.org", "published": "2021-12-10T10:15:09Z", "last_modified": "2026-08-11T19:33:44Z", "status": "Analyzed", "evaluator_comment": null, "evaluator_solution": null, "evaluator_impact": null, "cisa_exploit_add": "2021-12-10", "cisa_action_due": "2021-12-24", "cisa_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.", "cisa_vulnerability_name": "Apache Log4j2 Remote Code Execution Vulnerability", "descriptions": [ { "lang": "en", "value": "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." }, { "lang": "es", "value": "Las características JNDI de Apache Log4j2 2.0-beta9 hasta 2.15.0 (excluyendo las versiones de seguridad 2.12.2, 2.12.3 y 2.3.1) utilizadas en la configuración, los mensajes de registro y los parámetros no protegen contra LDAP controlado por un atacante y otros puntos finales relacionados con JNDI. Un atacante que pueda controlar los mensajes de registro o los parámetros de los mensajes de registro puede ejecutar código arbitrario cargado desde servidores LDAP cuando la sustitución de la búsqueda de mensajes está habilitada. A partir de la versión 2.15.0 de log4j, este comportamiento ha sido deshabilitado por defecto. A partir de la versión 2.16.0 (junto con las versiones 2.12.2, 2.12.3 y 2.3.1), esta funcionalidad se ha eliminado por completo. Tenga en cuenta que esta vulnerabilidad es específica de log4j-core y no afecta a log4net, log4cxx u otros proyectos de Apache Logging Services" } ], "references": [ { "url": "http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html", "source": "user@apache.org", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html", "source": "user@apache.org", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html", "source": "user@apache.org", "tags": [ "Exploit", "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html", "source": "user@apache.org", "tags": [ "Exploit", "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html", "source": "user@apache.org", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.html", "source": "user@apache.org", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.html", "source": "user@apache.org", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.html", "source": "user@apache.org", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.html", "source": "user@apache.org", "tags": [ "Broken Link", "Third Party Advisory", "VDB Entry" ] }, { "url": "http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html", "source": "user@apache.org", "tags": [ "Exploit", "Third Party Advisory", "VDB Entry" ] } ], "metrics": { "cvss_metric_v40": null, "cvss_metric_v31": [ { "source": "user@nist.gov", "type": "Primary", "cvss_data": { "version": "3.1", "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "NONE", "scope": "CHANGED", "confidentiality_impact": "HIGH", "integrity_impact": "HIGH", "availability_impact": "HIGH", "base_score": 10.0, "base_severity": "CRITICAL", "exploit_code_maturity": null, "remediation_level": null, "report_confidence": null, "temporal_score": null, "temporal_severity": null, "confidentiality_requirement": null, "integrity_requirement": null, "availability_requirement": null, "modified_attack_vector": null, "modified_attack_complexity": null, "modified_privileges_required": null, "modified_user_interaction": null, "modified_scope": null, "modified_confidentiality_impact": null, "modified_integrity_impact": null, "modified_availability_impact": null, "environmental_score": null, "environmental_severity": null }, "exploitability_score": 3.9, "impact_score": 6.0 }, { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvss_data": { "version": "3.1", "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "NONE", "scope": "CHANGED", "confidentiality_impact": "HIGH", "integrity_impact": "HIGH", "availability_impact": "HIGH", "base_score": 10.0, "base_severity": "CRITICAL", "exploit_code_maturity": null, "remediation_level": null, "report_confidence": null, "temporal_score": null, "temporal_severity": null, "confidentiality_requirement": null, "integrity_requirement": null, "availability_requirement": null, "modified_attack_vector": null, "modified_attack_complexity": null, "modified_privileges_required": null, 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{ "vendor_project": "Apache", "product": "Log4j2", "vulnerability_name": "Apache Log4j2 Remote Code Execution Vulnerability", "date_added": "2021-12-10", "short_description": "Apache Log4j2 contains a vulnerability where JNDI features do not protect against attacker-controlled JNDI-related endpoints, allowing for remote code execution.", "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.", "due_date": "2021-12-24", "known_ransomware_campaign_use": "Known", "notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-44228" }, "vdeep_metric": { "available_versions": [ "3.1", "2.0" ], "source": "user@nist.gov", "type": "Primary", "cvss_data": { "version": "3.1", "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "attack_vector": "NETWORK", "attack_complexity": "LOW", "attack_requirements": null, "privileges_required": "NONE", "user_interaction": "NONE", "vulnerable_system_confidentiality": "HIGH", "vulnerable_system_integrity": "HIGH", "vulnerable_system_availability": "HIGH", "subsequent_system_confidentiality": null, "subsequent_system_integrity": null, "subsequent_system_availability": null, "exploit_maturity": null, "confidentiality_requirements": null, "integrity_requirements": null, "availability_requirements": null, "modified_attack_vector": null, "modified_attack_complexity": null, "modified_attack_requirements": null, "modified_privileges_required": null, "modified_user_interaction": null, "modified_vulnerable_system_confidentiality": null, "modified_vulnerable_system_integrity": null, "modified_vulnerable_system_availability": null, "modified_subsequent_system_confidentiality": null, "modified_subsequent_system_integrity": null, "modified_subsequent_system_availability": null, "safety": null, "automatable": null, "recovery": null, "value_density": null, "vulnerability_response_effort": null, "provider_urgency": null, "base_score": 10.0, "base_severity": "CRITICAL" } } } } ``` ## Related Examples - [EternalBlue (CVE-2017-0144)](/reference/vulnerability/detail/examples/cve-2017-0144/) - [Citrix Bleed (CVE-2023-4966)](/reference/vulnerability/detail/examples/cve-2023-4966/) - [Shellshock (CVE-2014-6271)](/reference/vulnerability/detail/examples/cve-2014-6271/) - [XZ Utils Backdoor (CVE-2024-3094)](/reference/vulnerability/detail/examples/cve-2024-3094/) - [Heartbleed (CVE-2014-0160)](/reference/vulnerability/detail/examples/cve-2014-0160/) - [OpenSSH regreSSHion (CVE-2024-6387)](/reference/vulnerability/detail/examples/cve-2024-6387/)