{"id":"CVE-2021-1782","kind":"vulnerability","aliases":["CVE-2021-1782"],"related":[],"title":"Apple Multiple Products: Apple Multiple Products Race Condition Vulnerability","description":"A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..","summary":"A race condition in the Apple kernel on iOS, iPadOS, macOS, watchOS and tvOS lets a malicious app gain higher privileges on the device. Attackers have exploited it in the wild, and CISA lists it in its Known Exploited Vulnerabilities catalog.","severity":"high","cvss":7.0,"epss":0.02222,"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","tvos","watchos"],"not_affected_if":["fully-patched-devices"],"how_to_check":"Check the OS version on each Apple device (Settings > General > About on iOS, About This Mac on macOS) and compare it with Apple's security notes for the fixed build.","fix":"Update each Apple device to a release that includes Apple's fix for CVE-2021-1782, as CISA directs.","status":"open","published_at":"2021-04-02T18:15:21+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:39:37+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:39:37Z","model":"claude-haiku-5-5","output":{"fix":"Update each Apple device to a release that includes Apple's fix for CVE-2021-1782, as CISA directs.\nunknown","reach":"local","impact":"high","summary":"A race condition in the Apple kernel on iOS, iPadOS, macOS, watchOS and tvOS lets a malicious app gain higher privileges on the device. Attackers have exploited it in the wild, and CISA lists it in its Known Exploited Vulnerabilities catalog.","category":"infrastructure","who_cares":["ios","ipados","macos","watchos","tvos","apple-devices"],"confidence":0.6,"needs_auth":"yes","worst_case":"Malicious app gains elevated privileges on the device","analyst_note":"Sources do not name fixed versions; find Apple's security content page for CVE-2021-1782 to get the patched builds and exact affected versions.","how_to_check":"Check the OS version on each Apple device (Settings > General > About on iOS, About This Mac on macOS) and compare it with Apple's security notes for the fixed build.\nunknown","needs_analyst":true,"not_affected_if":["fully-patched-devices"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000497,"input_tokens":2833,"output_tokens":428,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-001':90C,95C '-1782':12A,15A '-2021':11A,14A '..':129C '11.2':86C '14.4':100C,102C,105C '2021':89C,94C '7.3':98C 'abl':111C 'activ':127C 'address':74C 'app':46B 'appl':1A,4A,20B,34B,115C 'apple':16A 'apple-devic':19B 'applic':108C 'attack':53B 'awar':117C 'big':84C 'catalina':91C 'catalog':69B 'cisa':61B 'condit':8A,31B,72C 'cve':10A,13A 'devic':21B,52B 'elev':113C 'exploit':22B,55B,67B,128C 'fix':81C 'gain':47B 'higher':48B 'improv':76C 'infrastructur':23B 'io':24B,37B,101C 'ipado':25B,38B,104C 'issu':79C,123C 'kernel':35B 'known':66B 'let':43B 'list':62B 'lock':77C 'maco':26B,39B,83C 'malici':45B,107C 'may':109C,124C 'mojav':96C 'multipl':2A,5A 'multiple':17A 'privileg':49B,114C 'product':3A,6A 'products':18A 'race':7A,30B,71C 'report':120C 'secur':87C,92C 'sur':85C 'tvos':27B,42B,99C 'updat':88C,93C 'vulner':9A,68B 'watcho':28B,40B,97C 'wild':59B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-04-02T18:15:21+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:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-1782","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-1782","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-2021-1782","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-1782","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-2021-1782","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1782","severity":null,"published_at":"2021-04-02T18:15:21+00:00","modified_at":"2026-06-17T03:32:33+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"}