CVE Enrichment

CVSS
5.9 MEDIUM
EPSS
100.00%
EPSS Percentile
99.99%
CISA KEV
Not listed

Description

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

Technical Details

CVSS Version
3.1
CNA / NVD Source
security@apache.org
Published
18-Dec-2021 19:15
Last Modified
25-Aug-2026 23:28
EPSS Date
2026-10-12
CWE
CWE-20, CWE-674

CVSS Vector

CVSS:3.1 AV:N / AC:H / PR:N / UI:N / S:U / C:N / I:N / A:H

Affected Products / Versions

References

Last enrichment sync: 13-Oct-2026 19:06
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE (3)

Malware (4)

People (3)

Threat Actors (2)

MITRE ATT&CK (4)

Vendors (1)

Products (16)

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Tools (4)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.