Backblaze vulnerabilities

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Published CVEs affecting Backblaze products: 1 record(s), with severity, exploitation and fixes.

Backblaze Client 1

Exploited only (KEV) →

CVE-2026-19820 High · 7.8 CWE-59 Aug 31, 2026

Backblaze Client for Windows Improper Link Resolution Vulnerability

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.