{"id":"CVE-2026-19820","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-19820","summary":"A vulnerability in the Backblaze Client allows a local user to make the system not bootable by creating a link from Backblaze's folder to Windows OS system files during a backup. Successful…","details":"A vulnerability in the Backblaze Client allows a local user to make the system not bootable by creating a link from Backblaze's folder to Windows OS system files during a backup. Successful exploitation requires an administrator-level system change that results in the absence of specific Windows OS security controls. This vulnerability is due to improper link resolution.","published":"2026-09-01T01:16:33.137","modified":"2026-09-01T01:16:33.137","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://www.backblaze.com/computer-backup/docs/backup-client-release-notes-windows"},{"type":"WEB","url":"https://www.backblaze.com/status/update"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-01T01:16:33.137"}}