CVE-2026-111560 Barracuda Networks Multiple Products OS Command Injection Vulnerability
Barracuda Networks Email Security Gateway (ESG), Load Balancer, Application Delivery Controller (ADC), Message Archiver (BMA), WAF Control Center (WCC), Web Application Firewall (WAF), and Web Security Gateway (WSG) contain an OS command injection vulnerability. This vulnerability could allow an authenticated administrator to inject OS commands that execute with root privileges when the crafted timezone value is subsequently processed. This vulnerability can be chained with CVE-2026-116606
From the CISA KEV catalogue version 2026.11.10, with Cybergen analysis. Updated 10 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 10 Nov 2026.
- Rated High severity (CVSS 8.6, scored by Vendor).
What It Is
Improper neutralization of shell metacharacters in the timezone configuration field in certain Barracuda appliance products using common Barracuda code allows an authenticated administrator to inject OS commands that execute with root privileges when the crafted timezone value is subsequently processed.
Affected Versions
| Product | Versions |
|---|---|
| Barracuda Networks Barracuda Email Security Gateway (ESG) | 9.4.0.27 and earlier |
| Barracuda Networks Barracuda Load Balancer Application Delivery Controller (ADC) | 6.4.0 and earlier |
| Barracuda Networks Barracuda Web Application Firewall (WAF) | 11.0.1 and earlier |
| Barracuda Networks Barracuda Web Security Gateway (WSG) | 16.1.100.100 and earlier |
| Barracuda Networks Barracuda Message Archiver (BMA) | 5.5.4.0 and earlier |
| Barracuda Networks Barracuda WAF Control Center (WCC) | 2.2.1 and earlier |
From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for Barracuda Networks Multiple Products. Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
Fix it
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Vulnerability Management - 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
Not Sure If You Are Exposed?
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