{"id":"CVE-2026-86981","title":"An out-of-bounds write issue was addressed with improved bounds checking","summary":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"adp","vendor":"Apple","product":"macOS","affected":["macOS < 15.8","macOS < 26.7"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-20T10:11:41.422786Z"},"published":"2026-10-20","updated":"2026-10-26","sourceUpdated":"2026-10-26T20:41:24.342Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-86981","references":[{"url":"https://support.apple.com/en-us/149042"},{"url":"https://support.apple.com/en-us/149043"}],"tags":["cve.org"],"epss":0.00134,"epssPercentile":0.02886,"ingestedAt":"2026-10-20T01:49:42.585Z","slug":"CVE-2026-86981","body":"## Overview\n\nAn out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.\n\n## Affected\n\n- `macOS < 15.8`\n- `macOS < 26.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225445,"id":"CVE-2026-86981","ts":1792497986497,"field":"cvss","old":null,"new":"5.5"},{"seq":225444,"id":"CVE-2026-86981","ts":1792497986497,"field":"severity","old":"none","new":"medium"}]}