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VulnerabilitiesNov 4, 2026

Critical Barracuda Security Flaws Could Let Hackers Bypass Authentication and Gain Root Access

Barracuda discloses two critical vulnerabilities allowing root access and authentication bypass.

Barracuda has disclosed two critical vulnerabilities, CVE-2026-116606 and CVE-2026-111560, that can be exploited together to grant attackers root access and bypass authentication on affected appliances. While exploitation requires administrative interface access, Barracuda urges customers to install the latest firmware and security updates immediately. The vendor has not reported active exploitation or identified an associated attack campaign.

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The lesson from this incident

Full lesson

Two critical vulnerabilities in Barracuda appliances can be chained together to allow attackers to bypass authentication and gain root-level access, representing a severe risk to organizations relying on these devices for network security. Although exploitation currently requires access to the administrative interface, threat actors frequently target management planes once they establish a foothold. The absence of reported active exploitation creates a narrow but closing window to apply patches before attackers begin weaponizing these flaws. This incident underscores that critical network appliances are high-value targets and must be patched with the same urgency applied to internet-facing servers. Delayed patching of security appliances is especially dangerous because a compromised gateway device can undermine every other security control downstream.

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Indicators of Compromise

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  • cve — CVE-2026-116606
  • cve — CVE-2026-111560

Entities

Barracuda (vendor)Barracuda Email Security Gateway (product)Load Balancer Application Delivery Controller (product)Message Archiver (product)WAF Control Center (product)Web Application Firewall (product)