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CVE-2021-44228: Apache Log4j2 Remote Code Execution Vulnerability
Apache Log4j2 · in CISA KEV since 2021-12-10
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2021-12-10added to KEV
2021-12-24federal remediation due date
100.00%EPSS exploit probability (30 days) 100.0th percentile
10 CRITICALCVSS 3.1
Knownknown ransomware use
0days from NVD publication to KEV
What it is
Apache Log4j2 contains a vulnerability where JNDI features do not protect against attacker-controlled JNDI-related endpoints, allowing for remote code execution.
Required action (CISA)
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.
| CWE | CWE-20;CWE-400;CWE-502 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD published | 2021-12-10 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-44228.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.