{"id":"CVE-2020-27930","published":"2020-12-08T21:15:13Z","modified":"2026-06-17T03:09:53Z","title":"Apple Multiple Products Memory Corruption Vulnerability","vendor":"Apple","product":"Multiple Products","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"Apple's multiple products, including macOS, iOS, iPadOS and watchOS, contain a memory corruption flaw (classified as an out-of-bounds write) in the component that processes fonts. An attacker who can get a user to process a maliciously crafted font, which requires local access and user interaction with no authentication, may be able to execute arbitrary code.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:09Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.22009,"percentile":0.97655,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-27930","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-10-26","exploitedFirstSeen":"2020-10-26","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2020-10-26"},{"url":"https://googleprojectzero.github.io/0days-in-the-wild//0day-RCAs/2020/CVE-2020-16009.html","date":"2021-02-04"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2021-11-03"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 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Advisory"]},{"url":"https://support.apple.com/en-us/HT211947","tags":["Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://seclists.org/fulldisclosure/2020/Dec/32","tags":["Mailing List","Third Party Advisory"]},{"url":"https://support.apple.com/en-us/HT211928","tags":["Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT211929","tags":["Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT211931","tags":["Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT211940","tags":["Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT211944","tags":["Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT211945","tags":["Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT211946","tags":["Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT211947","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27930","tags":["US Government Resource"]}],"techniques":[{"id":"T1204.002","name":"Malicious File","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: User opens malicious font file, triggering exploit","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Processing a maliciously crafted font may lead to arbitrary code execution","start":344,"end":418}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Successful exploitation yields arbitrary code 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expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2020-20423","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-20423","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2021-02-07","earliestUrl":"https://github.com/FunPhishing/Apple-Safari-Remote-Code-Execution-CVE-2020-27930","repos":[{"name":"FunPhishing/Apple-Safari-Remote-Code-Execution-CVE-2020-27930","url":"https://github.com/FunPhishing/Apple-Safari-Remote-Code-Execution-CVE-2020-27930","stars":0,"created":"2021-02-07"}]},"first":{"date":"2021-02-07","source":"PoC-in-GitHub","url":"https://github.com/FunPhishing/Apple-Safari-Remote-Code-Execution-CVE-2020-27930"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html"],"flow":[{"stage":"exploitation","techniques":["T1204.002"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2020-10-26","kind":"exploited-reported","label":"Exploitation 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