CVE-2026-116606: Barracuda Networks Barracuda Email Security Gateway (ESG) (Critical, CVSS 9.3)
- CVSS
- 9.3 Critical (v4.0)
- EPSS
- 0.7% chance of exploitation in the next 30 days (higher than 54.3% of CVEs)
- Exploited in the wild
- Not on CISA’s KEV list
- Public exploit
- None reported in public exploit databases
- Weakness
- CWE-288
- 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- Published
- Nov 2, 2026
What it is
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.
Description from the National Vulnerability Database.
What to do
Check whether you run Barracuda Networks Barracuda Email Security Gateway (ESG), then apply the vendor’s fix or mitigation from the advisories below.
ThreatRoundup coverage
Two Barracuda Bugs Chain From No Password to Root on Email Gateways
Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.