CVE-2023-39004: Opnsense

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

Insecure permissions in the configuration directory (/conf/) of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allow attackers to access sensitive information (e.g., hashed root password) which could lead to privilege escalation.

Affected products

• Opnsense Opnsense: before 23.7 (fixed in 23.7)

Published 2023-08-09. Last modified 2026-07-09.