CVE-2010-20109: Barracuda Networks Spam & Virus Firewall

High severity, CVSS 8.7. EPSS: 1.7% chance of exploitation in the next 30 days.

Barracuda products, confirmed in Spam & Virus Firewall, SSL VPN, and Web Application Firewall versions prior to October 2010, contain a path traversal vulnerability in the view_help.cgi endpoint. The locale parameter fails to properly sanitize user input, allowing attackers to inject traversal sequences and null-byte terminators to access arbitrary files on the underlying system. By exploiting this flaw, unauthenticated remote attackers can retrieve sensitive configuration files such as /mail/snapshot/config.snapshot, potentially exposing credentials, internal settings, and other critical data.

Affected products

• Barracuda Networks Spam & Virus Firewall: up to and including 4.1.1.021
• Barracuda Networks SSL VPN: up to and including 2010-10
• Barracuda Networks Web Application Firewall: up to and including 2010-10

Published 2025-08-21. Last modified 2026-06-16.