Security Advisory
CVE-2026-19820
N/A
UNKNOWN
Vulnerability Description
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 Date
September 1, 2026
Official Source
NIST NVD Advisory