# CVE-2021-44228

## Summary

- **CVE ID:** CVE-2021-44228
- **Severity:** CRITICAL
- **CVSS Score:** 10 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-502, CWE-400, CWE-20
- **Published:** Dec 10, 2021
- **Last Modified:** Sep 14, 2026

## 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.

## Affected Products

- Apache Software Foundation — Apache Log4j2 (2.0-beta9)

## References

- [CNA](https://logging.apache.org/log4j/2.x/security.html)
- [CNA](http://www.openwall.com/lists/oss-security/2021/12/10/1)
- [CNA](http://www.openwall.com/lists/oss-security/2021/12/10/2)
- [CNA](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd)
- [CNA](http://www.openwall.com/lists/oss-security/2021/12/10/3)
- [CNA](https://security.netapp.com/advisory/ntap-20211210-0007/)
- [CNA](http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html)
- [CNA](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032)
- [CNA](https://www.oracle.com/security-alerts/alert-cve-2021-44228.html)
- [CNA](https://www.debian.org/security/2021/dsa-5020)
- [CNA](https://lists.debian.org/debian-lts-announce/2021/12/msg00007.html)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU57UJDCFIASIO35GC55JMKSRXJMCDFM/)
- [CNA](https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/)
- [CNA](http://www.openwall.com/lists/oss-security/2021/12/13/2)
- [CNA](http://www.openwall.com/lists/oss-security/2021/12/13/1)
- [CNA](http://www.openwall.com/lists/oss-security/2021/12/14/4)
- [CNA](https://www.kb.cert.org/vuls/id/930724)
- [CNA](https://twitter.com/kurtseifried/status/1469345530182455296)
- [CNA](https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf)
- [CNA](http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html)
- [CNA](http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html)
- [CNA](http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html)
- [CNA](https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html)
- [CNA](http://www.openwall.com/lists/oss-security/2021/12/15/3)
- [CNA](http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.html)
- [CNA](http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html)
- [CNA](http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.html)
- [CNA](http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.html)
- [CNA](http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.html)
- [CNA](https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5CSVUNV4HWZZXGOKNSK6L7RPM7BOKIB/)
- [CNA](http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html)
- [CNA](https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf)
- [CNA](https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf)
- [CNA](https://www.oracle.com/security-alerts/cpujan2022.html)
- [CNA](http://packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-Injection.html)
- [CNA](https://github.com/cisagov/log4j-affected-db/blob/develop/SOFTWARE-LIST.md)
- [CNA](http://packetstormsecurity.com/files/165642/VMware-vCenter-Server-Unauthenticated-Log4Shell-JNDI-Injection-Remote-Code-Execution.html)
- [CNA](http://packetstormsecurity.com/files/165673/UniFi-Network-Application-Unauthenticated-Log4Shell-Remote-Code-Execution.html)
- [CNA](http://seclists.org/fulldisclosure/2022/Mar/23)
- [CNA](https://www.bentley.com/en/common-vulnerability-exposure/be-2022-0001)
- [CNA](https://github.com/cisagov/log4j-affected-db)
- [CNA](https://support.apple.com/kb/HT213189)
- [CNA](https://www.oracle.com/security-alerts/cpuapr2022.html)
- [CNA](https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-44228)
- [CNA](https://www.nu11secur1ty.com/2021/12/cve-2021-44228.html)
- [CNA](http://seclists.org/fulldisclosure/2022/Jul/11)
- [CNA](http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html)
- [CNA](http://packetstormsecurity.com/files/167917/MobileIron-Log4Shell-Remote-Command-Execution.html)
- [CNA](http://seclists.org/fulldisclosure/2022/Dec/2)
- [CNA](http://packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-Remote-Code-Execution.html)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-44228)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 94.36%
- **EPSS Percentile:** 100.0

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Dec 10, 2021
- **Due Date:** Dec 24, 2021

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._