{"id":"CVE-2026-84009","title":"Time-of-check time-of-use (toctou) race condition in Windows Projected File System allows an authorized attacker to perform tampering locally.","summary":"Time-of-check time-of-use (toctou) race condition in Windows Projected File System allows an authorized attacker to perform tampering locally.","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-367"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T21:19:09.730","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84009","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84009","label":"secure@microsoft.com"}],"tags":["nvd"],"ingestedAt":"2026-10-13T19:43:29.146Z","slug":"CVE-2026-84009","body":"## Overview\n\nTime-of-check time-of-use (toctou) race condition in Windows Projected File System allows an authorized attacker to perform tampering locally.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}