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CVE Record
[ HIGH ]CVE-2026-116606

Barracuda Networks Email Security Gateway (ESG) Authentication Bypass Using an Alternate Path or Channel Vulnerability

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.

cat cve-2026-116606.json
Vendor
Barracuda Networks
Product
Barracuda Email Security Gateway (ESG)
CVSS
N/A
EPSS (exploit probability)
1.6%
Status
kev
CISA patch-by (BOD 22-01)
Added to KEV
Source
https://nvd.nist.gov/vuln/detail/CVE-2026-116606

Is CVE-2026-116606 being exploited?

Yes. CISA added CVE-2026-116606 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.

FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 1.6% (scored November 10, 2026).

Catalog snapshot 2026-11-10. Full cross-catalog view: /kev-comparison

CVE-2026-116606 timeline

  1. Published to NVD
  2. Added to CISA KEV+8d

Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON

What to do

CISA required actionApply 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.

US federal civilian agencies must remediate by (3 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.

Other Barracuda Networks CVEs we track

CVE / VulnerabilitySeverityCVSSEPSSAdded to KEV
CVE-2026-111560
Barracuda Networks Multiple Products OS Command Injection Vulnerability
[ HIGH ]—1.1%