{"id":"CVE-2020-9934","published":"2020-10-16T17:15:17Z","modified":"2026-06-17T03:28:50Z","title":"Apple iOS, iPadOS, and macOS Input Validation Vulnerability","vendor":"Apple","product":"iOS, iPadOS, and macOS","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an input validation weakness in how Apple iOS, iPadOS, and macOS handle environment variables, which Apple fixed in iOS 13.6, iPadOS 13.6, and macOS Catalina 10.15.6. A local user with low privileges, requiring no user interaction, may be able to view sensitive user information.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:14:31Z"},"cvss":{"score":5.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.03208,"percentile":0.88131,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2022-09-08","dueDate":"2022-09-29","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://support.apple.com/en-us/HT211288, https://support.apple.com/en-us/HT211289; https://nvd.nist.gov/vuln/detail/CVE-2020-9934","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-07-19","exploitedFirstSeen":"2022-07-19","ransomware":false,"evidence":[{"url":"https://www.welivesecurity.com/2022/07/19/i-see-what-you-did-there-look-cloudmensis-macos-spyware/","date":"2022-07-19"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-09-08"}],"evidenceTotal":2,"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, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[],"references":[{"url":"https://support.apple.com/HT211288","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/HT211289","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/HT211288","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/HT211289","tags":["Release Notes","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9934","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: local user exploits environment variable handling flaw","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"A local user may be able to view sensitive user information","start":183,"end":242}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1005","name":"Data from Local System","tactics":["collection"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: reads sensitive user data from local system","mappingType":"primary_impact","evidence":[{"from":"description","quote":"may be able to view sensitive user information","start":196,"end":242}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2020-30713","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-30713","exploited":true,"exploitedSince":"2022-09-08","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2020-07-27","earliestUrl":"https://github.com/mattshockl/CVE-2020-9934","repos":[{"name":"mattshockl/CVE-2020-9934","url":"https://github.com/mattshockl/CVE-2020-9934","stars":24,"created":"2020-07-27"}]},"metasploit":[{"name":"Bypass the macOS TCC Framework","module":"post/osx/escalate/tccbypass","type":"post","disclosureDate":null,"url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/post/osx/escalate/tccbypass.rb"}],"first":{"date":"2020-07-27","source":"PoC-in-GitHub","url":"https://github.com/mattshockl/CVE-2020-9934"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"},{"stage":"primary","techniques":["T1005"],"provenance":"ai"}],"timeline":[{"date":"2020-07-27","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/mattshockl/CVE-2020-9934","provenance":"source"},{"date":"2020-10-16","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9934","provenance":"source"},{"date":"2022-07-19","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV 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