CVE-2017-5645
In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a...
- Published
- Apr 17, 2017
- Updated
- Oct 8, 2026
- Assigning CNA
- apache
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.8%
- Model date
- Oct 12, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.
Sources
log4j/CVE-2017-5645
Apache Log4j TCP Server Deserialization Remote Code Execution (CVE-2017-5645)
Vulhub vulnerability labsDeclared conditions
- lab image version: vulhub/log4j:2.8.1(log4j/CVE-2017-5645/docker-compose.yml:services.log4j.image)
network/cves/2017/CVE-2017-5645.yaml
Nuclei TemplatesDeclared conditions
- network: tcp($.protocol_keys)
- verification: word($.matchers[*].type)
- oob: interactsh_reference($.template_text)
Responsible use
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