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ExploitedIn CISA KEVAwaiting NVD analysis

CVE-2026-116606

Authentication Bypass Allows Global Configuration Restore in Barracuda Email Security Gateway

Exploitation confirmed. First attested on 2026-11-10 by CISA-ADP, CISA KEV.

  • Published2026-11-02
  • WeaknessCWE-288

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-11-0212:59CVE publishedCNA
  2. 2026-11-0213:17CVE publishedNVD
  3. 2026-11-0706:22First public proof of conceptPoC-in-GitHub
  4. 2026-11-0903:55Nuclei detection templateProjectDiscovery
  5. 2026-11-10Reported as exploited by ENISA (EUVD)ENISA EUVD
  6. 2026-11-10Exploitation first reportedENISA EUVD
  7. 2026-11-10Added to the CISA KEV catalogCISA KEV
  8. 2026-11-1019:50SSVC exploitation set to activeCISA-ADP

Versions per branch

Products declared by the CNA

As Mandiant, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Barracuda Networks Barracuda Email Security Gateway (ESG)other versions: not affected
    Affected
    • < 9.4.0.030fixed in 9.4.0.030custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-02

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-116606 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-11-07 06:23 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2026-11-10

Sources

Identifiers

Technical details

CVSS 4.0 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
Published
2026-11-02
Last Modified
2026-11-03
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-9fcr-mp7p-hprv

Frequently asked questions

What is 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.

Is CVE-2026-116606 actively exploited?

Yes. CVE-2026-116606 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by the specified date.

What is the CVSS score for CVE-2026-116606?

A CVSS score has not been assigned to CVE-2026-116606 yet.

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Sources for this record