{"id":"CVE-2026-86957","kind":"vulnerability","aliases":["CVE-2026-86957"],"related":[],"title":"Apple: out-of-bounds read lets nearby attacker crash iOS and macOS","description":"An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. An attacker in wireless proximity may be able to cause unexpected system termination.","summary":"An out-of-bounds read in Apple's operating systems can be triggered by an attacker in wireless proximity. The result is an unexpected system termination, which is a crash rather than code execution.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple","infrastructure","ios","ipados","macos","tvos","visionos","watchos"],"not_affected_if":["already-patched-version"],"how_to_check":"- Check the device version under Settings > General > About (iOS, iPadOS, visionOS) or Apple menu > About This Mac (macOS, versions listed as `26.7`, `15.8`, `27`).\n- Compare against the fixed versions: iOS and iPadOS `26.7` or `27`, macOS Tahoe `26.7`, macOS Sequoia `15.8`, macOS Golden Gate `27`, tvOS, visionOS and watchOS `27`.","fix":"- Update iOS and iPadOS to `26.7` or `27`.\n- Update macOS Tahoe to `26.7`, macOS Sequoia to `15.8`, or install macOS Golden Gate `27`.\n- Update tvOS, visionOS and watchOS to `27`.","status":"open","published_at":"2026-10-20T01:17:28+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","triaged_at":"2026-10-25T03:55:43+00:00","updated_at":"2026-10-25T03:55:43+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-25T03:55:43Z","model":"claude-haiku-5-5","output":{"fix":"- Update iOS and iPadOS to `26.7` or `27`.\n- Update macOS Tahoe to `26.7`, macOS Sequoia to `15.8`, or install macOS Golden Gate `27`.\n- Update tvOS, visionOS and watchOS to `27`.","reach":"network","title":"Apple: out-of-bounds read lets nearby attacker crash iOS and macOS","impact":"low","summary":"An out-of-bounds read in Apple's operating systems can be triggered by an attacker in wireless proximity. The result is an unexpected system termination, which is a crash rather than code execution.","category":"infrastructure","nicknames":[],"who_cares":["apple","ios","macos","ipados","visionos","watchos","tvos"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker in wireless range crashes the device, forcing an unexpected restart.","analyst_note":"","how_to_check":"- Check the device version under Settings > General > About (iOS, iPadOS, visionOS) or Apple menu > About This Mac (macOS, versions listed as `26.7`, `15.8`, `27`).\n- Compare against the fixed versions: iOS and iPadOS `26.7` or `27`, macOS Tahoe `26.7`, macOS Sequoia `15.8`, macOS Golden Gate `27`, tvOS, visionOS and watchOS `27`.","needs_analyst":false,"not_affected_if":["already-patched-version"],"who_is_affected":"Any Apple device running an version older than the listed fixes is affected, and the attacker needs to be within wireless range of the device. Fleet owners running Apple hardware should prioritize updates, though the impact is limited to a crash. Teams with no Apple devices in scope can skip it.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000663,"input_tokens":3349,"output_tokens":656,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-86957':16A,19A '15.8':96C '26.7':81C,84C,99C '27':86C,89C,93C,101C,103C,105C 'abl':113C 'address':70C 'appl':1A,20B,35B 'attack':9A,44B,107C 'bound':5A,32B,67C,73C 'caus':115C 'check':74C 'code':61B 'crash':10A,58B 'cve':14A,17A 'execut':62B 'fix':78C 'gate':92C 'golden':91C 'improv':72C 'infrastructur':21B 'io':11A,22B,80C,85C 'ipado':23B,83C,88C 'issu':76C 'let':7A 'maco':13A,24B,90C,94C,97C 'may':111C 'nearbi':8A 'oper':37B 'out-of-bound':2A,29B,64C 'proxim':47B,110C 'rather':59B 'read':6A,33B,68C 'result':49B 'sequoia':95C 'system':38B,53B,117C 'taho':98C 'termin':54B,118C 'trigger':41B 'tvos':25B,100C 'unexpect':52B,116C 'visiono':26B,102C 'watcho':27B,104C 'wireless':46B,109C","nicknames":[],"mitigations":[],"who_affected":"Any Apple device running an version older than the listed fixes is affected, and the attacker needs to be within wireless range of the device. Fleet owners running Apple hardware should prioritize updates, though the impact is limited to a crash. Teams with no Apple devices in scope can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T01:17:28+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-86957","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86957","severity":null,"published_at":"2026-10-20T01:17:28+00:00","modified_at":"2026-10-20T15:03:59+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","fetched_at":"2026-10-23T22:28:57+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"}