Vulnerability Details CVE-2026-116606
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.089
EPSS Ranking 95.3%
CVSS Severity
CVSS v3 Score 9.8
Proposed Action
Barracuda Networks Email Security Gateway (ESG) contains an authentication bypass using an alternate path or channel that could allow 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. This vulnerability can be chained with CVE-2026-111560.
Ransomware Campaign
Unknown
References
Products affected by CVE-2026-116606
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cpe:2.3:h:barracuda:email_security_gateway_300:-
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cpe:2.3:h:barracuda:email_security_gateway_400:-
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cpe:2.3:h:barracuda:email_security_gateway_600:-
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cpe:2.3:h:barracuda:email_security_gateway_800:-
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cpe:2.3:h:barracuda:email_security_gateway_900:-
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cpe:2.3:o:barracuda:email_security_gateway_300_firmware:-
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cpe:2.3:o:barracuda:email_security_gateway_300_firmware:5.1.3.001
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cpe:2.3:o:barracuda:email_security_gateway_300_firmware:9.2.0.006
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cpe:2.3:o:barracuda:email_security_gateway_300_firmware:9.4.0.029
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cpe:2.3:o:barracuda:email_security_gateway_400_firmware:-
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cpe:2.3:o:barracuda:email_security_gateway_400_firmware:5.1.3.001
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cpe:2.3:o:barracuda:email_security_gateway_400_firmware:9.2.0.006
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cpe:2.3:o:barracuda:email_security_gateway_400_firmware:9.4.0.029
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cpe:2.3:o:barracuda:email_security_gateway_600_firmware:-
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cpe:2.3:o:barracuda:email_security_gateway_600_firmware:5.1.3.001
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cpe:2.3:o:barracuda:email_security_gateway_600_firmware:9.2.0.006
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cpe:2.3:o:barracuda:email_security_gateway_600_firmware:9.4.0.029
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cpe:2.3:o:barracuda:email_security_gateway_800_firmware:-
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cpe:2.3:o:barracuda:email_security_gateway_800_firmware:5.1.3.001
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cpe:2.3:o:barracuda:email_security_gateway_800_firmware:9.2.0.006
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cpe:2.3:o:barracuda:email_security_gateway_800_firmware:9.4.0.029
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cpe:2.3:o:barracuda:email_security_gateway_900_firmware:-
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cpe:2.3:o:barracuda:email_security_gateway_900_firmware:5.1.3.001
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cpe:2.3:o:barracuda:email_security_gateway_900_firmware:9.2.0.006
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cpe:2.3:o:barracuda:email_security_gateway_900_firmware:9.4.0.029