CVE•Published 2017-04-17•Modified 2026-10-08•1 article on news•6 live references•NVD data
CVE-2017-5645Apache · Log4j
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2017-04-17
Modified 2026-10-08
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag109,483 hosts
vuln:CVE-2017-5645Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Apache Log4j"All exposed Apache Log4j instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Log4j"HTTP body or banner mentions "Log4j" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2017-5645Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2017-5645Censys host search filtered to this CVE id.
grep.app
CVE-2017-5645Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2017-5645GitHub code search for direct mentions.
Google dork
"CVE-2017-5645" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.