{"schema_version":"1","data":[{"id":2991,"advisory_id":"c07524db-7907-4943-b553-61a12f1fac4d","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30858","source_published_at":"2021-11-03T00:00:00+00:00","published_at":"2026-10-24T21:27:10.308701+00:00","extraction_method":"structured","technologies":["core-kev","ios-ipados-and-macos"],"cve_ids":["CVE-2021-30858"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Apple iOS, iPadOS, macOS Use-After-Free Vulnerability","summary":"Apple iOS, iPadOS, and macOS WebKit contain a use-after-free 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-2021-30858","products":[{"name":{"value":"iOS, iPadOS, and macOS","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-30858","aliases":["CVE-2021-30858"],"affected":[],"modified":"2021-11-03T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-416"],"cveID":"CVE-2021-30858","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-30858","dueDate":"2021-11-17","product":"iOS, iPadOS, and macOS","dateAdded":"2021-11-03","vendorProject":"Apple","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Apple iOS, iPadOS, and macOS WebKit contain a use-after-free 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, iPadOS, macOS Use-After-Free Vulnerability","knownRansomwareCampaignUse":"Unknown"}},"related_cves":[{"value":"CVE-2021-30858","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null}}],"next_after":2991,"next_before":2991}