{"id":"CVE-2026-86950","published":"2026-09-28T20:17:11Z","modified":"2026-10-27T12:29:30Z","title":"Apple Multiple Products Out-of-Bounds Write Vulnerability","vendor":"Apple","product":"Multiple Products","tier":"core","eol":null,"description":{"text":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.11 and iPadOS 18.7.11, iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27.","provenance":"source","from":"NVD"},"summary":{"text":"An out-of-bounds write flaw in multiple Apple products, including iOS, iPadOS, and macOS, stems from insufficient bounds checking. An attacker who can get a user to open a maliciously crafted file can achieve arbitrary code execution, which requires user interaction and no prior authentication, with network access as the delivery path.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T07:10:58Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.26166,"percentile":0.97992,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-09-29","dueDate":"2026-10-13","ransomware":false,"requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","notes":"https://support.apple.com/en-us/149226 ; https://support.apple.com/en-us/149228 ; https://support.apple.com/en-us/149229 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-86950","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-09-28","exploitedFirstSeen":"2026-09-28","ransomware":false,"evidence":[{"url":"https://support.apple.com/en-us/149226","date":"2026-09-28"},{"url":"https://support.apple.com/en-us/149228","date":"2026-09-28"},{"url":"https://support.apple.com/en-us/149229","date":"2026-09-28"},{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2026-09-29"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-09-29"},{"url":"https://support.apple.com/en-us/149225","date":"2026-10-26"}],"evidenceTotal":6,"provenance":"source"},"exploited":true,"otx":{"pulseCount":27,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"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"}],"provenance":"machine"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"references":[{"url":"https://support.apple.com/en-us/149225","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/149226","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/149228","tags":["Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/149229","tags":["Release Notes","Vendor Advisory"]},{"url":"http://seclists.org/fulldisclosure/2026/Sep/89","tags":["Mailing List","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2026/Sep/90","tags":["Mailing List","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2026/Sep/91","tags":["Mailing List","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-86950","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 crafted file triggering execution","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Processing a maliciously crafted file may lead to arbitrary code execution","start":201,"end":275}],"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: Arbitrary code execution is the direct impact","mappingType":"primary_impact","evidence":[{"from":"description","quote":"Processing a maliciously crafted file may lead to arbitrary code execution","start":201,"end":275}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-88445","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-88445","exploited":true,"exploitedSince":"2026-09-29","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":7,"skipped":0,"earliest":"2026-09-29","earliestUrl":"https://github.com/DeAurity/CVE-2026-86950-POC","repos":[{"name":"msuiche/hotcell","url":"https://github.com/msuiche/hotcell","stars":10,"created":"2026-10-01"},{"name":"decalage2/detect_CVE-2026-86950","url":"https://github.com/decalage2/detect_CVE-2026-86950","stars":6,"created":"2026-10-02"},{"name":"34zY/CVE-2026-86950","url":"https://github.com/34zY/CVE-2026-86950","stars":1,"created":"2026-10-01"},{"name":"java99999/CVE-2026-86950-POC","url":"https://github.com/java99999/CVE-2026-86950-POC","stars":1,"created":"2026-10-02"},{"name":"0xBlackash/CVE-2026-86950","url":"https://github.com/0xBlackash/CVE-2026-86950","stars":1,"created":"2026-10-05"}]},"first":{"date":"2026-09-29","source":"PoC-in-GitHub","url":"https://github.com/DeAurity/CVE-2026-86950-POC"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1204.002"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2026-09-28","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86950","provenance":"source"},{"date":"2026-09-28","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://support.apple.com/en-us/149226","provenance":"source"},{"date":"2026-09-29","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/DeAurity/CVE-2026-86950-POC","provenance":"source"},{"date":"2026-09-29","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-09-29","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-88445","provenance":"source"}],"speed":{"daysToPublicExploit":1,"firstExploitFrom":"PoC-in-GitHub","daysToKev":1},"priority":{"score":78.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV 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