{"id":"CVE-2026-116606","aliases":["EUVD-2026-115149","GHSA-9fcr-mp7p-hprv"],"status":"published","title":"Authentication Bypass Allows Global Configuration Restore in Barracuda Email Security Gateway","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.","severity":{"version":"4.0","score":9.3,"vector":"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.08934,"percentile":0.95313,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-288"],"published":"2026-11-02T12:59:11Z","modified":"2026-11-12T12:31:33Z","kev":{"date_added":"2026-11-10","due_date":"2026-11-13","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.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-11-10"},{"source":"kev","since":"2026-11-10"}],"exploits":[{"source":"pocgithub","id":"watchtowrlabs/watchTowr-vs-Barracuda-RCE-CVE-2026-116606-CVE-2026-111560","title":"watchtowrlabs/watchTowr-vs-Barracuda-RCE-CVE-2026-116606-CVE-2026-111560","date":"2026-11-03","url":"https://github.com/watchtowrlabs/watchTowr-vs-Barracuda-RCE-CVE-2026-116606-CVE-2026-111560"},{"source":"pocgithub","id":"ZeroHackOrg/barracuda-esg-zeroday-cve-2026-116606-analysis","title":"ZeroHackOrg/barracuda-esg-zeroday-cve-2026-116606-analysis","date":"2026-11-11","url":"https://github.com/ZeroHackOrg/barracuda-esg-zeroday-cve-2026-116606-analysis"},{"source":"nuclei","id":"CVE-2026-116606","title":"Barracuda Email Security Gateway - Authentication Bypass","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-116606.yaml"}],"products":[{"vendor":"barracuda","product":"email_security_gateway_300_firmware"},{"vendor":"barracuda","product":"email_security_gateway_400_firmware"},{"vendor":"barracuda","product":"email_security_gateway_600_firmware"},{"vendor":"barracuda","product":"email_security_gateway_800_firmware"},{"vendor":"barracuda","product":"email_security_gateway_900_firmware"},{"vendor":"barracuda networks","product":"barracuda email security gateway (esg)"}],"references":[{"url":"https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0042.md","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://trust.barracuda.com/security/pre-authentication-authorization-bypass-command-injection","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-116606","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116606"},{"url":"https://github.com/advisories/GHSA-9fcr-mp7p-hprv"}],"sources":{"cve":[{"id":"CVE-2026-116606","title":"Authentication Bypass Allows Global Configuration Restore in Barracuda Email Security Gateway","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.","status":"published","published":"2026-11-02T12:59:11.278Z","modified":"2026-11-11T04:55:23.905Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical","assessor":"cna"}],"cwes":["CWE-288"],"updated_at":"2026-11-10T22:18:26.309435Z"}],"euvd":[{"id":"EUVD-2026-115149","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.","status":"published","published":"2026-11-02T12:59:11Z","modified":"2026-11-11T04:55:23Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical"}],"exploited_since":"2026-11-10","updated_at":"2026-11-10T21:23:27.178873Z"}],"ghsa":[{"id":"GHSA-9fcr-mp7p-hprv","title":"An authentication bypass in Barracuda Email Security Gateway versions earlier than 9.4.0.030...","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.","status":"published","published":"2026-11-02T15:31:31Z","modified":"2026-11-12T12:31:33Z","cvss":[{"version":"4.0","score":9.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-288"],"updated_at":"2026-11-12T12:41:03.365003Z"}],"kev":[{"id":"CVE-2026-116606","title":"Barracuda Networks Email Security Gateway (ESG) Authentication Bypass Using an Alternate Path or Channel Vulnerability","description":"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.","cwes":["CWE-288"],"kev":{"date_added":"2026-11-10","due_date":"2026-11-13","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.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-10T20:11:01.498133Z"}],"nvd":[{"id":"CVE-2026-116606","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.","status":"published","published":"2026-11-02T13:17:37.017Z","modified":"2026-11-12T11:34:22.65Z","cvss":[{"version":"4.0","score":9.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-288"],"updated_at":"2026-11-12T13:31:09.80489Z"}]}}