HIGH 7.8 NVD
CVE-2026-19820
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 file
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.
References
- https://www.backblaze.com/computer-backup/docs/backup-client-release-notes-windows
- https://www.backblaze.com/status/update
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-09-01 via NVD.
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