Home › Exploited CVEs › CVE-2021-45046
CVE-2021-45046: Apache Log4j2 Deserialization of Untrusted Data Vulnerability
Apache Log4j2 · in CISA KEV since 2023-05-01
2023-05-01added to KEV
2023-05-22federal remediation due date
99.98%EPSS exploit probability (30 days) 100.0th percentile
9 CRITICALCVSS 3.1
Knownknown ransomware use
503days from NVD publication to KEV
What it is
Apache Log4j2 contains a deserialization of untrusted data vulnerability due to the incomplete fix of CVE-2021-44228, where the Thread Context Lookup Pattern is vulnerable to remote code execution in certain non-default configurations.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-917 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD published | 2021-12-14 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-45046.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.