{"schema_version":"1","data":[{"id":3506,"advisory_id":"8c82503e-24c2-4c80-a40c-061b78c48401","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30666","source_published_at":"2021-11-03T00:00:00+00:00","published_at":"2026-10-24T21:36:16.431318+00:00","extraction_method":"structured","technologies":["core-kev","ios"],"cve_ids":["CVE-2021-30666"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Apple iOS WebKit Buffer Overflow Vulnerability","summary":"Apple iOS WebKit contains a buffer-overflow vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-30666","products":[{"name":{"value":"iOS","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-30666","aliases":["CVE-2021-30666"],"affected":[],"modified":"2021-11-03T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-119"],"cveID":"CVE-2021-30666","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-30666","dueDate":"2021-11-17","product":"iOS","dateAdded":"2021-11-03","vendorProject":"Apple","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Apple iOS WebKit contains a buffer-overflow vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.","vulnerabilityName":"Apple iOS WebKit Buffer Overflow Vulnerability","knownRansomwareCampaignUse":"Unknown"}},"related_cves":[{"value":"CVE-2021-30666","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null}}],"next_after":3506,"next_before":3506}