--- title: "CVE-2021-44228: Apache Log4j2 JNDI features… | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2021-44228 --- # CVE-2021-44228: Apache Log4j2 JNDI features… | CubePath ## 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. Official description from the CVE record, published by apache. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-44228) ## Key data ### CVSS 3.1 Critical 10.0 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | ------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Changed | The impact can reach other components beyond the vulnerable one. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.99999 (99.99% probability) Percentile 99.99% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Apache Log4j2 Remote Code Execution Vulnerability Added to the catalog Dec 10, 2021 Federal due date Dec 24, 2021 Ransomware campaigns Known use ### CISA assessment as of Feb 4, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-502](https://cwe.mitre.org/data/definitions/502.html) Deserialization of Untrusted Data - [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption - [CWE-20](https://cwe.mitre.org/data/definitions/20.html) Improper Input Validation ## Affected products Products listed in the CVE record, as the CNA published them. - Apache Log4j2 - affected: 2.0-beta9 up to before log4j-core\* ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [logging.apache.org/log4j/2.x/security.html](https://logging.apache.org/log4j/2.x/security.html) - [\[oss-security\] 20211210 CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints](http://www.openwall.com/lists/oss-security/2021/12/10/1) (openwall.com) mailing-list - [\[oss-security\] 20211210 Re: CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints](http://www.openwall.com/lists/oss-security/2021/12/10/2) (openwall.com) mailing-list - [20211210 Vulnerability in Apache Log4j Library Affecting Cisco Products: December 2021](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd) (tools.cisco.com) vendor-advisory - [\[oss-security\] 20211210 Re: CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints](http://www.openwall.com/lists/oss-security/2021/12/10/3) (openwall.com) mailing-list - [security.netapp.com/advisory/ntap-20211210-0007](https://security.netapp.com/advisory/ntap-20211210-0007/) - [packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-R…](http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html) - [psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032) - [oracle.com/security-alerts/alert-cve-2021-44228.html](https://www.oracle.com/security-alerts/alert-cve-2021-44228.html) - [DSA-5020](https://www.debian.org/security/2021/dsa-5020) (debian.org) vendor-advisory - [\[debian-lts-announce\] 20211212 \[SECURITY\] \[DLA 2842-1\] apache-log4j2 security update](https://lists.debian.org/debian-lts-announce/2021/12/msg00007.html) (lists.debian.org) mailing-list - [FEDORA-2021-f0f501d01f](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU57UJDCFIASIO35GC55JMKSRXJMCDFM/) (lists.fedoraproject.org) vendor-advisory - [Microsoft’s Response to CVE-2021-44228 Apache Log4j 2](https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/) (msrc-blog.microsoft.com) vendor-advisory - [\[oss-security\] 20211213 Re: CVE-2021-4104: Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2](http://www.openwall.com/lists/oss-security/2021/12/13/2) (openwall.com) mailing-list - [\[oss-security\] 20211213 CVE-2021-4104: Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2](http://www.openwall.com/lists/oss-security/2021/12/13/1) (openwall.com) mailing-list - [\[oss-security\] 20211214 CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack](http://www.openwall.com/lists/oss-security/2021/12/14/4) (openwall.com) mailing-list - [VU#930724](https://www.kb.cert.org/vuls/id/930724) (kb.cert.org) third-party-advisory - [twitter.com/kurtseifried/status/1469345530182455296](https://twitter.com/kurtseifried/status/1469345530182455296) - [cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf) - [packetstormsecurity.com/files/165260/VMware-Security-Adviso…](http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html) - [packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-R…](http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html) - [packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-I…](http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html) - [intel.com/content/www/us/en/security-center/advisory/intel-…](https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html) - [\[oss-security\] 20211215 Re: CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack](http://www.openwall.com/lists/oss-security/2021/12/15/3) (openwall.com) mailing-list - [packetstormsecurity.com/files/165282/Log4j-Payload-Generato…](http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.html) - [packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regex…](http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html) - [packetstormsecurity.com/files/165307/Log4j-Remote-Code-Exec…](http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.html) - [packetstormsecurity.com/files/165311/log4j-scan-Extensive-S…](http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.html) - [packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code…](http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.html) - [cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf) - [FEDORA-2021-66d6c484f3](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5CSVUNV4HWZZXGOKNSK6L7RPM7BOKIB/) (lists.fedoraproject.org) vendor-advisory - [packetstormsecurity.com/files/165371/VMware-Security-Adviso…](http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html) - [cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf) - [cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf) - [oracle.com/security-alerts/cpujan2022.html](https://www.oracle.com/security-alerts/cpujan2022.html) - [packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-…](http://packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-Injection.html) - [github.com/cisagov/log4j-affected-db/blob/develop/SOFTWARE-…](https://github.com/cisagov/log4j-affected-db/blob/develop/SOFTWARE-LIST.md) - [packetstormsecurity.com/files/165642/VMware-vCenter-Server-…](http://packetstormsecurity.com/files/165642/VMware-vCenter-Server-Unauthenticated-Log4Shell-JNDI-Injection-Remote-Code-Execution.html) - [packetstormsecurity.com/files/165673/UniFi-Network-Applicat…](http://packetstormsecurity.com/files/165673/UniFi-Network-Application-Unauthenticated-Log4Shell-Remote-Code-Execution.html) - [20220314 APPLE-SA-2022-03-14-7 Xcode 13.3](http://seclists.org/fulldisclosure/2022/Mar/23) (seclists.org) mailing-list - [bentley.com/en/common-vulnerability-exposure/be-2022-0001](https://www.bentley.com/en/common-vulnerability-exposure/be-2022-0001) - [github.com/cisagov/log4j-affected-db](https://github.com/cisagov/log4j-affected-db) - [support.apple.com/kb/HT213189](https://support.apple.com/kb/HT213189) - [oracle.com/security-alerts/cpuapr2022.html](https://www.oracle.com/security-alerts/cpuapr2022.html) - [github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-44228](https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-44228) - [nu11secur1ty.com/2021/12/cve-2021-44228.html](https://www.nu11secur1ty.com/2021/12/cve-2021-44228.html) - [20220721 Open-Xchange Security Advisory 2022-07-21](http://seclists.org/fulldisclosure/2022/Jul/11) (seclists.org) mailing-list - [packetstormsecurity.com/files/167794/Open-Xchange-App-Suite…](http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html) - [packetstormsecurity.com/files/167917/MobileIron-Log4Shell-R…](http://packetstormsecurity.com/files/167917/MobileIron-Log4Shell-Remote-Command-Execution.html) - [20221208 Intel Data Center Manager <= 5.1 Local Privileges Escalation](http://seclists.org/fulldisclosure/2022/Dec/2) (seclists.org) mailing-list - [packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-R…](http://packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-Remote-Code-Execution.html) ## Timeline 1. ID reserved Nov 26, 2021 2. Record published Dec 10, 2021 3. Added to CISA KEV Dec 10, 2021 4. Record last updated Oct 21, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:05 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)