{"id":"CVE-2020-27930","kind":"vulnerability","aliases":["CVE-2020-27930"],"related":[],"title":"Apple Multiple Products: Apple Multiple Products Memory Corruption Vulnerability","description":"A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. Processing a maliciously crafted font may lead to arbitrary code execution.","summary":"Apple's FontParser component in iOS, iPadOS, macOS and watchOS has a memory corruption bug triggered by a maliciously crafted font file. An attacker who gets a device to process that font can run code on it, and CISA lists it as actively exploited.","severity":"high","cvss":7.8,"epss":0.22009,"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","ios","ipados","macos","vendor","watchos"],"not_affected_if":["fully-patched-devices"],"how_to_check":"Check the device OS version (Settings > General > About on iOS/iPadOS, About This Mac on macOS, Watch app on watchOS) and compare it to the patched release in Apple's security notes.","fix":"Update iOS, iPadOS, macOS and watchOS to a release that includes Apple's fix for this CVE, per Apple's vendor instructions.","status":"open","published_at":"2020-12-08T21:15:13+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:32:10+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:32:10Z","model":"claude-haiku-5-5","output":{"fix":"Update iOS, iPadOS, macOS and watchOS to a release that includes Apple's fix for this CVE, per Apple's vendor instructions.\nunknown","reach":"internet","impact":"high","summary":"Apple's FontParser component in iOS, iPadOS, macOS and watchOS has a memory corruption bug triggered by a maliciously crafted font file. An attacker who gets a device to process that font can run code on it, and CISA lists it as actively exploited.","category":"vendor","who_cares":["ios","ipados","macos","watchos","apple-devices"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs arbitrary code on the device via a crafted font","analyst_note":"Find the fixed Apple OS versions and the Apple security notes entry for CVE-2020-27930 (support.apple.com/security); sources did not list them.","how_to_check":"Check the device OS version (Settings > General > About on iOS/iPadOS, About This Mac on macOS, Watch app on watchOS) and compare it to the patched release in Apple's security notes.\nunknown","needs_analyst":true,"not_affected_if":["fully-patched-devices"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000507,"input_tokens":2839,"output_tokens":446,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-006':100C,106C '-2020':11A,14A '-27930':12A,15A '10.15.7':117C,122C '11.0.1':90C '12.4.9':94C '14.2':109C,112C '2020':99C,105C '5.3.9':114C '6.2.9':96C '7.1':92C 'activ':70B 'address':77C 'appl':1A,4A,20B,28B 'apple':16A 'apple-devic':19B 'arbitrari':132C 'attack':51B 'big':88C 'bug':42B 'catalina':116C,121C 'cisa':66B 'code':62B,133C 'compon':31B 'corrupt':8A,41B,74C 'craft':47B,127C 'cve':10A,13A 'devic':21B,55B 'execut':134C 'exploit':22B,71B 'file':49B 'fix':85C 'font':48B,59B,128C 'fontpars':30B 'get':53B 'high':101C 'improv':79C 'input':80C 'io':23B,33B,93C,108C 'ipado':24B,34B,111C 'issu':75C,83C 'lead':130C 'list':67B 'maco':25B,35B,87C,115C,120C 'malici':46B,126C 'may':129C 'memori':7A,40B,73C 'mojav':107C 'multipl':2A,5A 'multiple':17A 'process':57B,124C 'product':3A,6A 'products':18A 'run':61B 'secur':97C,103C 'sierra':102C 'supplement':118C 'sur':89C 'trigger':43B 'updat':98C,104C,119C,123C 'valid':81C 'vendor':26B 'vulner':9A 'watcho':27B,37B,91C,95C,113C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-12-08T21:15:13+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","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-2020-27930","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-27930","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":"2026-10-25T15:39:43+00:00","note":null},{"source":"epss","external_id":"CVE-2020-27930","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-27930","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-2020-27930","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27930","severity":null,"published_at":"2020-12-08T21:15:13+00:00","modified_at":"2026-06-17T03:09:53+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"}