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Log4j: What’s Happened Since

ID: 42e5cbee-5ea4-5e76-aee8-ebffa5f7a31f

STIX ID: report--42e5cbee-5ea4-5e76-aee8-ebffa5f7a31f

Feed Name: ReliaQuest Blog

Threat Score
90/100

Date Published: 2021-12-15

Date Updated: 2026-04-29

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This blog summarizes the critical Log4j vulnerability (CVE-2021-44228) and a follow-on DoS issue (CVE-2021-45046), reports widespread active exploitation (scanning, coin miners, Cobalt Strike beacons and ransomware), cites large-scale telemetry (over 1.2M exploit attempts observed) and urges rapid patching, asset management and mitigations.

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