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CVE-2026-116606

Barracuda Email Security Gateway 300 Firmware

CVSS 4.0
9.3 critical
CISA KEV
Exploited · listed 10 Nov 2026
Technical details
Weakness
CWE-288
EPSS · 12 Nov 2026
8.93% · p95
Public resources
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

Listed in CISA KEV on 10 Nov 2026 (Barracuda Networks Email Security Gateway (ESG) Authentication Bypass Using an Alternate Path or Channel Vulnerability). CISA has evidence this flaw has been exploited.

No VulnCrest analysis published for this CVE yet. Below is the original CNA/NVD description, unmodified.

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.

Exploits & detection

Exploitwatchtowrlabs/watchTowr-vs-Barracuda-RCE-CVE-2026-116606-CVE-2026-111560 · github · ★ 4 · discovered
Unreviewed third-party code. Fake PoCs often contain malware — read the code before running it.
ExploitZeroHackOrg/barracuda-esg-zeroday-cve-2026-116606-analysis · github · ★ 1 · discovered
Unreviewed third-party code. Fake PoCs often contain malware — read the code before running it.
Detection templateBarracuda Email Security Gateway - Authentication Bypass · nuclei · discovered

In the news

Timeline

  • Published: 02 Nov 2026
  • Last modified upstream: 12 Nov 2026
  • Added to CISA KEV: 10 Nov 2026

Sources & licenses

CVE / CVSS / CWE
NVD record ↗ (unmodified). This product uses the NVD API but is not endorsed or certified by the NVD. CVE® © The MITRE Corporation.
Exploitation
CISA KEV (CC0) · EPSS by FIRST.org
References used for the analysis
Analysis, summary and remediation
© VulnCrest

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