{"id":"CVE-2021-1782","published":"2021-04-02T18:15:21Z","modified":"2026-06-17T03:32:33Z","title":"Apple Multiple Products Race Condition Vulnerability","vendor":"Apple","product":"Multiple Products","tier":"core","eol":null,"description":{"text":"A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..","provenance":"source","from":"NVD"},"summary":{"text":"Apple multiple products (including macOS, watchOS, tvOS, iOS and iPadOS) contains a race condition, caused by improper locking, that is addressed in the listed updates. A malicious application running locally on the affected device may be able to elevate its privileges, and exploitation requires that an attacker already have local access, a low-privileged account, and an app that triggers the flaw without user interaction.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:14:29Z"},"cvss":{"score":7.0,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.02222,"percentile":0.82647,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-1782","provenance":"source"},"vulncheckKev":{"dateAdded":"2021-01-26","exploitedFirstSeen":"2021-01-26","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2021-01-26"},{"url":"https://support.apple.com/kb/HT212146","date":"2021-01-26"},{"url":"https://support.apple.com/kb/HT212148","date":"2021-01-26"},{"url":"https://support.apple.com/kb/HT212149","date":"2021-01-26"},{"url":"https://support.apple.com/kb/HT212147","date":"2021-02-01"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2021-11-03"}],"evidenceTotal":6,"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":[{"id":"CWE-667","name":"Improper Locking"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"references":[{"url":"https://support.apple.com/en-us/HT212146","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212147","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212148","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212149","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212146","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212147","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212148","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212149","tags":["Release Notes","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782","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: requires user to run malicious app","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"A malicious application may be able to elevate privileges","start":215,"end":272}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: race condition yields privilege escalation","mappingType":"primary_impact","evidence":[{"from":"description","quote":"A malicious application may be able to elevate privileges","start":215,"end":272}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-7246","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-7246","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":1,"earliest":"2021-02-10","earliestUrl":"https://github.com/synacktiv/CVE-2021-1782","repos":[{"name":"synacktiv/CVE-2021-1782","url":"https://github.com/synacktiv/CVE-2021-1782","stars":40,"created":"2021-02-10"}]},"first":{"date":"2021-02-10","source":"PoC-in-GitHub","url":"https://github.com/synacktiv/CVE-2021-1782"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1204.002"],"provenance":"ai"},{"stage":"primary","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2021-01-26","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV 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listing","points":0.0,"detail":"added 2102 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":16.53,"detail":"percentile 0.8265"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":4.9,"detail":"base score 7.0"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-apple-ios-macos-cwe-667"}}