Backblaze Client vulnerabilities

Latest Backblaze Client CVEs

Newest publication first

1. CVE-2026-19820 Backblaze Client for Windows Improper Link Resolution Vulnerability

   Published 2026-09-01

   Medium·CVSS 5.8 EPSS 0.49%

   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...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.