CVE-2026-116606 Authentication Bypass Allows Global Configuration Restore in Barracuda Email Security Gateway
- Published
- Updated
- Exploit status
- Exploited in the wild (confirmed)
Description
An authentication bypass in Barracuda Email Security Gateway versions earlier than 9.4.0.030 allows an unauthenticated remote attacker to invoke a configuration-import function and restore a crafted, compatible backup archive, resulting in unauthorized modification of the appliance’s global configuration.
CISA Known Exploited Vulnerability
- Date added
- 2026-11-10
- Due date (FCEB)
- 2026-11-13
- Ransomware use
- Unknown
Required action
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| barracuda networks Barracuda Email Security Gateway (ESG) | < 9.4.0.030 | 9.4.0.030 |
| barracuda email security gateway 300 firmware | < 9.4.0.030 | 9.4.0.030 |
| barracuda email security gateway 400 firmware | < 9.4.0.030 | 9.4.0.030 |
| barracuda email security gateway 600 firmware | < 9.4.0.030 | 9.4.0.030 |
| barracuda email security gateway 800 firmware | < 9.4.0.030 | 9.4.0.030 |
| barracuda email security gateway 900 firmware | < 9.4.0.030 | 9.4.0.030 |
References
- github.com third-party-advisory
- trust.barracuda.com vendor-advisory
- www.cisa.gov government-resource us-government-resource