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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…

Critical9.8EPSS 89.4%
Published
Updated
Reserved
Assigned by
apache

Description

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.

Scores

CVSS scores of CVE-2017-5645, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
89.4% · top 0.2% of all CVEs (3 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: total

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

Affected products

  • Apache Software Foundation · Apache Log4j

    • affected All versions between 2.0-alpha1 and 2.8.1

Affected packages

From reviewed advisories of the GitHub Advisory Database.

References (82)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .