Critical CVEs CVE-2026-6686: FatFs File Extended Past End Leaks Deleted Data July 3, 2026 ♡Follow0 A file extended past its end in FatFs can leak leftover data from deleted files. CVSS 4.6 (Medium). Discovered from: Seven Unpatched FatFs Flaws Expose Millions of Embedded Devices to Code Execution CVE-2026-6686deleted dataFatFsinformation leak