{"id":"CVE-2020-9934","kind":"vulnerability","aliases":["CVE-2020-9934"],"related":[],"title":"An issue existed in the handling of environment variables","description":"An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A local user may be able to view sensitive user information.","summary":"Apple iOS, iPadOS and macOS have an input validation flaw that lets a local attacker view sensitive user information. CISA lists it as actively exploited in the wild.","severity":"medium","cvss":5.5,"epss":0.03208,"exploited":true,"exploited_at":"2022-09-08T00:00:00+00:00","products":[{"name":"Apple iOS, iPadOS, and macOS","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"apple ipados","fixed":["13.6"],"affected":"< 13.6","ecosystem":"vendor"},{"name":"apple iphone os","fixed":["13.6"],"affected":"< 13.6","ecosystem":"vendor"},{"name":"apple mac os x","fixed":["10.15.6"],"affected":"< 10.15.6","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apple-devices","exploited","ios","ipados","macos","vendor"],"not_affected_if":["fully-patched-devices"],"how_to_check":null,"fix":"Apply the Apple updates for iOS, iPadOS and macOS per vendor instructions; the specific fixed versions are not stated in the sources.","status":"open","published_at":"2020-10-16T17:15:17+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:10:48+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:10:48Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Apple updates for iOS, iPadOS and macOS per vendor instructions; the specific fixed versions are not stated in the sources.","reach":"local","impact":"medium","summary":"Apple iOS, iPadOS and macOS have an input validation flaw that lets a local attacker view sensitive user information. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["ios","ipados","macos","apple-devices"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Local attacker reads sensitive user information from the device.","analyst_note":"Find Apple's security content entry for CVE-2020-9934 to get fixed versions and exploitation details (see CISA KEV entry for source links).","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["fully-patched-devices"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000456,"input_tokens":2854,"output_tokens":342,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2020':11A,14A '-9934':12A,15A '10.15.6':94C '13.6':88C,91C 'abl':100C 'activ':61B 'address':78C 'and':19A 'appl':31B,38B 'apple':16A,21A,23A,26A 'apple-devic':30B 'attack':52B 'catalina':93C 'cisa':57B 'cve':10A,13A 'devic':32B 'environ':8A,73C 'exist':3A,68C 'exploit':33B,62B 'fix':85C 'flaw':47B 'handl':6A,71C 'improv':80C 'inform':56B,105C 'input':45B 'io':34B,39B,87C 'ios':17A 'ipado':35B,40B,90C 'ipados':18A,22A 'iphone':24A 'issu':2A,67C,76C,83C 'let':49B 'list':58B 'local':51B,96C 'mac':27A 'maco':36B,42B,92C 'macos':20A 'may':98C 'os':25A,28A 'sensit':54B,103C 'user':55B,97C,104C 'valid':46B,81C 'variabl':9A,74C 'vendor':37B 'view':53B,102C 'wild':65B 'x':29A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-10-16T17:15:17+00:00","kev":{"dateAdded":"2022-09-08","dueDate":"2022-09-29","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-9934","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-9934","severity":null,"published_at":"2022-09-08T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2020-9934","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-9934","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-9934","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9934","severity":null,"published_at":"2020-10-16T17:15:17+00:00","modified_at":"2026-06-17T03:28:50+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}