{"schema_version":"1","data":[{"id":2922,"advisory_id":"6178a42b-a9ec-46c5-a1eb-c0753b308132","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-33766","source_published_at":"2022-01-18T00:00:00+00:00","published_at":"2026-10-24T21:26:28.403876+00:00","extraction_method":"structured","technologies":["core-kev","exchange-server"],"cve_ids":["CVE-2021-33766"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Microsoft Exchange Server Information Disclosure","summary":"Microsoft Exchange Server contains an information disclosure vulnerability which can allow an unauthenticated attacker to steal email traffic from target. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-33766","products":[{"name":{"value":"Exchange Server","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-33766","aliases":["CVE-2021-33766"],"affected":[],"modified":"2022-01-18T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-287"],"cveID":"CVE-2021-33766","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-33766","dueDate":"2022-02-01","product":"Exchange Server","dateAdded":"2022-01-18","vendorProject":"Microsoft","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Microsoft Exchange Server contains an information disclosure vulnerability which can allow an unauthenticated attacker to steal email traffic from target.","vulnerabilityName":"Microsoft Exchange Server Information Disclosure","knownRansomwareCampaignUse":"Unknown"}},"related_cves":[{"value":"CVE-2021-33766","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":2922,"next_before":2922}