major vulnerability· requires attention

Affects a widely deployed enterprise email gateway; allows unauthenticated config import and potential admin takeover — high-impact on org email security and operations.

Infrastructure

CVE-2026-116606

9.3

Critical

EPSS n/aPatch available

Pre-auth bypass in Barracuda Email Security Gateway allows config takeover.

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

No EPSS score yet

Published 2 Nov 2026Analysed here 2 Nov 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-116606 being exploited?

Not confirmed. CVE-2026-116606 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.

How severe is CVE-2026-116606?

CVE-2026-116606 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-116606?

Yes. A fix has been recorded for CVE-2026-116606. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-116606 affect?

CVE-2026-116606 affects Barracuda Email Security Gateway (versions < 9.4.0.030). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-116606?

Update to 9.4.0.030+, restrict management access, rotate admin credentials, audit configs.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

Barracuda Email Security Gateway (versions < 9.4.0.030)

impact

Unauthenticated remote attacker can import crafted backup to modify global config, enabling administrative takeover and persistence.

action required

Immediate action required

affected versions

Barracuda Networks Barracuda Email Security Gateway (ESG)

affected< 9.4.0.030

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

timeline

2 Nov 2026Published
2 Nov 2026CVE record last updated · same day later
2 Nov 2026Analysed by vulneraibility.com · same day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

2 references in the CVE record: 2 advisories

Advisorygithub.com /mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0042.md
Advisorytrust.barracuda.com /security/pre-authentication-authorization-bypass-command-injection

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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