CVE-2021-44228

CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints

Vendor Apache Software Foundation
Product Apache Log4j2
Weakness CWE-502 · Unsafe deserialization
KEV Status Known Exploited
Ransomware Used in campaigns
Published December 10, 2021
Last update October 21, 2025
View on NVD All CVEs

CVSS base score

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What the vulnerability does

01Description

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.

CISA mandated remediation

02CISA 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.

Key dates

03Disclosure timeline

December 10, 2021 CVE published
October 21, 2025 Record updated

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