Vulnerability in Barracuda Networks Barracuda Email Security Gateway (ESG)

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.3

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• NCSC-NL4 Nov 2026NCSC-2026-0465

  Vulnerabilities fixed in Barracuda Email Security Gateway Translated from Dutch

  Probability/damage M/HCVE-2026-116606CVE-2026-111560
• BSI CERT-Bund2 Nov 2026WID-SEC-2026-4295

  Barracuda Networks Email Security Gateway and Web Application Firewall: Multiple vulnerabilities Translated from German

  CVE-2026-116606CVE-2026-111560

[ In the news ]News stories naming CVE-2026-116606

• The Hacker News3 Nov 2026, 15:59 UTC

  Barracuda Flaws Could Be Chained to Bypass Authorization and Gain Root Access

  CVE-2026-116606

[ References ]References

• github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0042.md
• trust.barracuda.com/security/pre-authentication-authorization-bypass-command-injection