---
id: CVE-2026-116606
title: >-
  Authentication Bypass Allows Global Configuration Restore in Barracuda Email
  Security Gateway
summary: >-
  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 …
severity: critical
cvss: 9.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-288
vendor: Barracuda Networks
product: Barracuda Email Security Gateway (ESG)
affected:
  - barracuda_email_security_gateway_esg < 9.4.0.030
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-11-02T00:00:00+00:00'
published: '2026-11-02'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T04:55:19.015Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116606'
references:
  - url: >-
      https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0042.md
  - url: >-
      https://trust.barracuda.com/security/pre-authentication-authorization-bypass-command-injection
tags:
  - cve.org
epss: 0.00728
epssPercentile: 0.54301
ingestedAt: '2026-11-05T19:30:42.892Z'
---

## Overview

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.

## Affected

- `barracuda_email_security_gateway_esg < 9.4.0.030`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.