Public vulnerability disclosure

CVE-2026-116606

Authentication Bypass Allows Global Configuration Restore in Barracuda Email Security Gateway

publishedCWE-288

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.

Investigate in Cyber JSON Markdown

Technical severity9.3 criticalCVSS 4.0 · CNA: Mandiant

Published2026-11-02Source updated 2026-11-02

Collected2026-11-021 attributed source

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Barracuda Email Security Gateway (ESG) Barracuda Networks	≥ 0; < 9.4.0.030 (affected, custom) Other versions: unaffected	CNA: Mandiant

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 9.3 critical	`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`	CNA: Mandiant

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0042.mdCNA: Mandiant · third-party-advisory
https://trust.barracuda.com/security/pre-authentication-authorization-bypass-command-injectionCNA: Mandiant · vendor-advisory