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TI-2020-06707 Aliases CVE-2020-8290GHSA-mfc8-4qmg-g3x6

Improper privilege management in Backblaze

Priority LOW 35CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-269.

Summary

Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.

Why it matters now

EPSS 0.00589 48th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed Backblaze: 7.0.0.439

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Backblazebefore 7.0.0.4397.0.0.439Patch availableCNA
  • Backblaze Vendor— Affected before 7.0.0.439 Fixed in 7.0.0.439 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:*before 7.0.0.439VulnerableBackblaze
cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:*before 7.0.0.439VulnerableBackblaze
  • cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:* Versions before 7.0.0.439 Vulnerable ·Backblaze
  • cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:* Versions before 7.0.0.439 Vulnerable ·Backblaze

Remediation

  • Fix · CNA Backblaze Fixed in 7.0.0.439

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-8290
  2. 2026-10-03 Alias added: GHSA-mfc8-4qmg-g3x6

References

Exploit 2

Other 1

  • TI-2020-06706 Improper certificate validation in Backblaze CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences