{"id":"CVE-2025-43300","kind":"vulnerability","aliases":["CVE-2025-43300"],"related":[],"title":"An out-of-bounds write issue was addressed with improved bounds checking","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12, iOS 18.6.2 and iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, macOS Sonoma 14.7.8, macOS Ventura 13.7.8. Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.","summary":"Apple iOS, iPadOS and macOS contain an out-of-bounds write in the Image I/O framework. Exploitation in the wild is confirmed by CISA's KEV catalog, and the sources describe an attacker gaining code execution through crafted image processing, which is not explicitly stated.","severity":"critical","cvss":10.0,"epss":null,"exploited":true,"exploited_at":"2025-08-21T00:00:00+00:00","products":[{"name":"Apple iOS, iPadOS, and macOS","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"apple ipados","fixed":["15.8.5"],"affected":"< 15.8.5","ecosystem":"vendor"},{"name":"apple ipados","fixed":["16.7.12"],"affected":">= 16.0, < 16.7.12","ecosystem":"vendor"},{"name":"apple ipados","fixed":["17.7.10"],"affected":">= 17.0, < 17.7.10","ecosystem":"vendor"},{"name":"apple ipados","fixed":["18.6.2"],"affected":">= 18.0, < 18.6.2","ecosystem":"vendor"},{"name":"apple iphone os","fixed":["15.8.5"],"affected":"< 15.8.5","ecosystem":"vendor"},{"name":"apple iphone os","fixed":["16.7.12"],"affected":">= 16.0, < 16.7.12","ecosystem":"vendor"},{"name":"apple iphone os","fixed":["18.6.2"],"affected":">= 17.0, < 18.6.2","ecosystem":"vendor"},{"name":"apple macos","fixed":["13.7.8"],"affected":">= 13.0, < 13.7.8","ecosystem":"vendor"},{"name":"apple macos","fixed":["14.7.8"],"affected":">= 14.0, < 14.7.8","ecosystem":"vendor"},{"name":"apple macos","fixed":["15.6.1"],"affected":">= 15.0, < 15.6.1","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apple-devices","exploited","ios","ipados","macos","vendor"],"not_affected_if":["unpatched-devices-not-present"],"how_to_check":"Check the device OS version under Settings > General > About (iOS/iPadOS) or About This Mac (macOS) and compare it against the fixed release in Apple's security notes.","fix":"Update iOS, iPadOS and macOS to the latest version Apple has released with the fix; the exact fixed version is unknown from the sources.\nFollow CISA's KEV guidance: apply vendor mitigations or discontinue use if mitigations are unavailable.","status":"open","published_at":"2025-08-21T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:46:32+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"vendor","confidence":0.45,"triage":{"at":"2026-10-23T20:46:32Z","model":"claude-haiku-5-5","output":{"fix":"Update iOS, iPadOS and macOS to the latest version Apple has released with the fix; the exact fixed version is unknown from the sources.\nFollow CISA's KEV guidance: apply vendor mitigations or discontinue use if mitigations are unavailable.","reach":"unknown","summary":"Apple iOS, iPadOS and macOS contain an out-of-bounds write in the Image I/O framework. Exploitation in the wild is confirmed by CISA's KEV catalog, and the sources describe an attacker gaining code execution through crafted image processing, which is not explicitly stated.","category":"vendor","who_cares":["ios","ipados","macos","apple-devices"],"confidence":0.45,"needs_auth":"unknown","worst_case":"Attacker may execute code on an affected Apple device via the Image I/O framework.","analyst_note":"Find Apple's security content page for this CVE to confirm fixed OS versions, attack vector and whether user interaction is required; the KEV entry alone does not say.","how_to_check":"Check the device OS version under Settings > General > About (iOS/iPadOS) or About This Mac (macOS) and compare it against the fixed release in Apple's security notes.\nunknown","needs_analyst":true,"not_affected_if":["unpatched-devices-not-present"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000499,"input_tokens":2550,"output_tokens":488,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2025':15A,18A '-43300':16A,19A '13.7.8':145C '14.7.8':142C '15.6.1':139C '15.8.5':121C,124C '16.7.12':126C,129C '17.7.10':136C '18.6.2':131C,134C 'address':9A,110C 'and':23A 'appl':49B,56B,156C 'apple':20A,25A,27A,29A,31A,33A,36A,39A,42A,44A,46A 'apple-devic':48B 'attack':89B,173C 'awar':158C 'bound':5A,12A,66B,106C,113C 'catalog':83B 'check':13A,114C 'cisa':80B 'code':91B 'confirm':78B 'contain':61B 'corrupt':155C 'craft':94B 'cve':14A,17A 'describ':87B 'devic':50B 'execut':92B 'explicit':100B 'exploit':51B,73B,168C 'extrem':171C 'file':150C 'fix':118C 'framework':72B 'gain':90B 'i/o':71B 'imag':70B,95B,149C 'improv':11A,112C 'individu':177C 'io':52B,57B,120C,125C,130C 'ios':21A 'ipado':53B,58B,123C,128C,133C,135C 'ipados':22A,26A,28A,30A,32A 'iphone':34A,37A,40A 'issu':7A,108C,116C,164C 'kev':82B 'maco':54B,60B,137C,140C,143C 'macos':24A,43A,45A,47A 'malici':148C 'may':151C,165C 'memori':154C 'os':35A,38A,41A 'out-of-bound':2A,63B,103C 'process':96B,146C 'report':161C 'result':152C 'sequoia':138C 'sonoma':141C 'sophist':172C 'sourc':86B 'specif':175C 'state':101B 'target':176C 'vendor':55B 'ventura':144C 'wild':76B 'write':6A,67B,107C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2025-08-21T00:00:00+00:00","kev":{"dateAdded":"2025-08-21","dueDate":"2025-09-11","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2025-43300","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-43300","severity":null,"published_at":"2025-08-21T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T14:39:38+00:00","note":null},{"source":"nvd","external_id":"CVE-2025-43300","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-43300","severity":null,"published_at":"2025-08-21T01:15:36+00:00","modified_at":"2026-06-17T09:23:42+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+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"}