{"schema_version":"1","data":[{"id":1333,"advisory_id":"b33b2fa9-dc28-4556-a9ab-5aeae95fd000","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-45046","source_published_at":"2023-05-01T00:00:00+00:00","published_at":"2026-10-24T21:00:34.362254+00:00","extraction_method":"structured","technologies":["core-kev","log4j2"],"cve_ids":["CVE-2021-45046"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Apache Log4j2 Deserialization of Untrusted Data Vulnerability","summary":"Apache Log4j2 contains a deserialization of untrusted data vulnerability due to the incomplete fix of CVE-2021-44228, where the Thread Context Lookup Pattern is vulnerable to remote code execution in certain non-default configurations. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-45046","products":[{"name":{"value":"Log4j2","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-45046","aliases":["CVE-2021-45046"],"affected":[],"modified":"2023-05-01T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-917"],"cveID":"CVE-2021-45046","notes":"https://logging.apache.org/log4j/2.x/security.html; https://nvd.nist.gov/vuln/detail/CVE-2021-45046","dueDate":"2023-05-22","product":"Log4j2","dateAdded":"2023-05-01","vendorProject":"Apache","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Apache Log4j2 contains a deserialization of untrusted data vulnerability due to the incomplete fix of CVE-2021-44228, where the Thread Context Lookup Pattern is vulnerable to remote code execution in certain non-default configurations.","vulnerabilityName":"Apache Log4j2 Deserialization of Untrusted Data Vulnerability","knownRansomwareCampaignUse":"Known"}},"related_cves":[{"value":"CVE-2021-45046","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null},"priority":{"reasons":["known_exploited"],"severity":"unknown","linked_cves":[],"fix_available":false,"known_exploited":true,"publisher_severity":"unknown"},"context_update":false}],"next_after":1333,"next_before":1333}