{"id":"CVE-2021-30807","kind":"vulnerability","aliases":["CVE-2021-30807"],"related":[],"title":"Apple Multiple Products: Apple Multiple Products Memory Corruption Vulnerability","description":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.","summary":"Apple iOS, iPadOS, macOS and watchOS have a memory corruption bug in the IOMobileFrameBuffer kernel component. A local app can exploit it to run code with kernel privileges.","severity":"critical","cvss":9.3,"epss":0.28839,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Apple Multiple Products","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apple-devices","exploited","infrastructure","ios","ipados","macos","watchos"],"not_affected_if":["fully-patched-devices"],"how_to_check":null,"fix":"Update Apple devices to a patched iOS, iPadOS, macOS or watchOS release per Apple's vendor instructions (fixed versions not stated in sources).","status":"open","published_at":"2021-10-19T14:15:08+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:37:10+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:37:10Z","model":"claude-haiku-5-5","output":{"fix":"Update Apple devices to a patched iOS, iPadOS, macOS or watchOS release per Apple's vendor instructions (fixed versions not stated in sources).","reach":"local","impact":"high","summary":"Apple iOS, iPadOS, macOS and watchOS have a memory corruption bug in the IOMobileFrameBuffer kernel component. A local app can exploit it to run code with kernel privileges.","category":"infrastructure","who_cares":["ios","ipados","macos","watchos","apple-devices"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Malicious app gains kernel privileges on the device, full device control.","analyst_note":"Find Apple's security content page for the 2021 patch releases to get fixed versions and check how to verify device patch level; CISA KEV lists it as actively exploited.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["fully-patched-devices"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00047,"input_tokens":2845,"output_tokens":370,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find Apple's security content page for the 2021 patch releases to get fixed versions and check how to verify device patch level; CISA KEV lists it as actively exploited.","search":"'-2021':11A,14A '-30807':12A,15A '11.5.1':74C '14.7.1':76C,79C '7.6.1':81C 'abl':86C 'activ':106C 'address':61C 'app':46B 'appl':1A,4A,20B,28B,94C 'apple':16A 'apple-devic':19B 'applic':83C 'arbitrari':89C 'awar':96C 'big':72C 'bug':38B 'code':52B,90C 'compon':43B 'corrupt':8A,37B,58C 'cve':10A,13A 'devic':21B 'execut':88C 'exploit':22B,48B,107C 'fix':69C 'handl':65C 'improv':63C 'infrastructur':23B 'io':24B,29B,75C 'iomobileframebuff':41B 'ipado':25B,30B,78C 'issu':59C,67C,102C 'kernel':42B,54B,92C 'local':45B 'maco':26B,31B,71C 'may':84C,103C 'memori':7A,36B,57C,64C 'multipl':2A,5A 'multiple':17A 'privileg':55B,93C 'product':3A,6A 'products':18A 'report':99C 'run':51B 'sur':73C 'vulner':9A 'watcho':27B,33B,80C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-10-19T14:15:08+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-2021-30807","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30807","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":"2026-10-25T10:39:08+00:00","note":null},{"source":"epss","external_id":"CVE-2021-30807","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-30807","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-2021-30807","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-30807","severity":null,"published_at":"2021-10-19T14:15:08+00:00","modified_at":"2026-06-17T03:50:55+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"}