{"id":"CVE-2021-30869","kind":"vulnerability","aliases":["CVE-2021-30869"],"related":[],"title":"Apple iOS, iPadOS, and macOS: Apple iOS, iPadOS, and macOS Type Confusion Vulnerability","description":"A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.","summary":"Apple iOS, iPadOS and macOS contain a type confusion bug in the XNU kernel. A malicious app running on the device can use it to execute code with kernel privileges.","severity":"critical","cvss":9.3,"epss":0.04135,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Apple iOS, iPadOS, and macOS","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apple-devices","exploited","ios","ipados","macos","vendor"],"not_affected_if":["fully-patched-devices"],"how_to_check":"Check the installed OS version on each iPhone, iPad or Mac under Settings > General > About (or Apple menu > About This Mac) and compare it with Apple's fixed release.","fix":"Update iOS, iPadOS and macOS to a release that includes Apple's fix for CVE-2021-30869, per the vendor instructions CISA references.","status":"open","published_at":"2021-08-24T19:15:15+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:43:36+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:43:36Z","model":"claude-haiku-5-5","output":{"fix":"Update iOS, iPadOS and macOS to a release that includes Apple's fix for CVE-2021-30869, per the vendor instructions CISA references.\nunknown","reach":"local","impact":"high","summary":"Apple iOS, iPadOS and macOS contain a type confusion bug in the XNU kernel. A malicious app running on the device can use it to execute code with kernel privileges.","category":"vendor","who_cares":["ios","ipados","macos","apple-devices"],"confidence":0.6,"needs_auth":"no","worst_case":"Malicious app gains kernel privileges and controls the device","analyst_note":"Find Apple's security advisory for CVE-2021-30869 to get the exact fixed iOS, iPadOS and macOS versions; the sources give no fixed versions.","how_to_check":"Check the installed OS version on each iPhone, iPad or Mac under Settings > General > About (or Apple menu > About This Mac) and compare it with Apple's fixed release.\nunknown","needs_analyst":true,"not_affected_if":["fully-patched-devices"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000491,"input_tokens":2858,"output_tokens":411,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-001':92C,97C '-006':102C '-2021':15A,18A '-30869':16A,19A '11.2':88C '12.5.5':79C '14.4':81C,84C '2021':91C,96C,101C 'abl':109C 'address':68C 'and':23A 'app':49B 'appl':1A,6A,26B,33B,117C 'apple':20A 'apple-devic':25B 'applic':106C 'arbitrari':112C 'awar':119C 'big':86C 'bug':42B 'catalina':93C,103C 'code':59B,113C 'confus':12A,41B,65C 'contain':38B 'cve':14A,17A 'devic':27B,53B 'execut':58B,111C 'exist':128C 'exploit':28B,124C 'fix':76C 'handl':72C 'improv':70C 'io':2A,7A,29B,34B,78C,80C 'ios':21A 'ipado':3A,8A,30B,35B,83C 'ipados':22A 'issu':66C,74C,127C 'kernel':46B,61B,115C 'maco':5A,10A,31B,37B,85C 'macos':24A 'malici':48B,105C 'may':107C 'mojav':98C 'privileg':62B,116C 'report':121C 'run':50B 'secur':89C,94C,99C 'state':71C 'sur':87C 'type':11A,40B,64C 'updat':90C,95C,100C 'use':55B 'vendor':32B 'vulner':13A 'wild':131C 'xnu':45B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-08-24T19:15:15+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-30869","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30869","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T12:39:25+00:00","note":null},{"source":"epss","external_id":"CVE-2021-30869","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-30869","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2021-30869","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-30869","severity":null,"published_at":"2021-08-24T19:15:15+00:00","modified_at":"2026-06-17T03:51:03+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}