Barracuda ESG Hit by High-Severity Vulnerabilities Allowing Chained Root Access
Barracuda Networks has released security patches for six products following the discovery of critical vulnerabilities that could allow attackers to obtain root access through chained exploitation.
The most concerning issues affect the Barracuda Email Security Gateway (ESG). The company disclosed the flaws in an advisory published on November 2, 2026, rating both CVE-2026-116606 and CVE-2026-111560 as High severity.
CVE-2026-116606: Pre-Authentication Authorization Bypass
CVE-2026-116606 is an authentication bypass vulnerability in ESG. When an attacker has access to the management interface, they can invoke the import function without authentication and load a specially crafted backup file. This allows unauthorized modification of the entire device configuration.
CVE-2026-111560: OS Command Injection
CVE-2026-111560 is an OS command injection flaw in the timezone configuration processing. While it requires an administrator account, successful exploitation permits execution of arbitrary commands with root privileges on the underlying operating system.
The command injection vulnerability affects multiple Barracuda products beyond ESG, including:
- Load Balancer Application Delivery Controller (ADC)
- Message Archiver (BMA)
- WAF Control Center (WCC)
- Web Application Firewall (WAF)
- Web Security Gateway (WSG)
Organizations using any of the affected products are strongly advised to apply the available patches immediately to mitigate the risk of chained attacks leading to full system compromise.
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