CVE-2026-9508 CRITICAL

CVE-2026-9508: Incorrect Permission Assignment for Critical Resource vulnerability in Suprema's BioStar

Vendor Suprema
Product BioStar 2 (server)
Weakness CWE-732
Published May 29, 2026
Last update May 29, 2026

CVSS base score

10.0/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

What the vulnerability does

01Description

Incorrect permission settings on a critical resource in Suprema BioStar 2 (versions 2.9.3 through 2.9.11) that allow backup files to be publicly exposed when the administrator configures their path within the NGINX webroot. This vulnerability allows an attacker with network access to directly download backup ZIP files via ‘http(s)://[server]/download/…’ without requiring authentication. This exposes highly sensitive information that can lead to server impersonation, unauthorized access to databases, and lateral movement.

Key dates

02Disclosure timeline

May 29, 2026 CVE published
May 29, 2026 Record updated