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CVE-2026-116606

See advisory•CRITICAL · CVSS 9.3•No exploitation reported

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.

CVSS9.3 NVD 4.0

SeverityCRITICAL

ExploitationNo exploitation reported

EPSS1% · P54

Triage statusNo Known Exploit

ActionPatch within 48 hours

CVSS vectorCVSS: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

CWECWE-288

NVD published2026-11-02

NVD last modified2026-11-03

Timeline

2026-11-02Published to the U.S. National Vulnerability Database (NVD)
2026-11-03NVD record last updated
2026-11-04First covered in a defend.network daily briefing

Affected product

See advisory

Remediation Steps

Apply the vendor security update for Barracuda Networks Products as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 1 of November 2026 (November 2 – 8)
Barracuda chained RCE, cPGuard backdoor supply chain, LLMjacking cloud fraud surge (2026-11-04)

Related vulnerabilities

CVE-2026-19490 – Citrix NetScaler (same weakness: CWE-288)
CVE-2026-18577 – N-Able N-Central (same weakness: CWE-288)
CVE-2026-18556 – N-Able N-Central (same weakness: CWE-288)
CVE-2026-34040 – Docker Engine (same weakness: CWE-288)
CVE-2026-20079 – Cisco Secure Firewall Management Center (FMC) And Security Cloud Control (SCC) Firewall Management (same weakness: CWE-288)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.