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CVE.org (no NVD analysis yet)· CNA Mandiant

CVE-2026-116606: Authentication Bypass Allows Global Configuration Restore in Barracuda Email Security Gateway

CriticalCVSS 9.3 · v4.0KEVWeaponized No fix recorded

Noroxi assessment

Priority: This week (action score 70/100)

  • CISA has confirmed exploitation in the wild (Nov 10, 2026). Remediation deadline for US federal agencies: Nov 13, 2026.
  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 8.9% (FIRST EPSS); higher than 95.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

Published
Nov 2, 2026
Updated
Nov 12, 2026
EPSS
8.9% · 95th percentile

Report tools

JSON

Action score

70

This week

Don’t wait for the next maintenance window.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
30 / 30 · Listed
EPSS
3 / 30 · 8.9%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Mandiant
9.3
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 10, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Nov 13, 2026.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-116606

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
barracudaemail security gateway 300 firmware
barracudaemail security gateway 300
barracudaemail security gateway 400 firmware
barracudaemail security gateway 400
barracudaemail security gateway 600 firmware
barracudaemail security gateway 600
barracudaemail security gateway 800 firmware
barracudaemail security gateway 800
barracudaemail security gateway 900 firmware
barracudaemail security gateway 900

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Mandiant). Independent of NVD's CPE analysis and usually ahead of it.

  • Barracuda Networks Barracuda Email Security Gateway (ESG)

    • before 9.4.0.030affected
Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • barracuda email security gateway 300 firmwarebefore 9.4.0.030
  • barracuda email security gateway 400 firmwarebefore 9.4.0.030
  • barracuda email security gateway 600 firmwarebefore 9.4.0.030
  • barracuda email security gateway 800 firmwarebefore 9.4.0.030
  • barracuda email security gateway 900 firmwarebefore 9.4.0.030

Same product

barracuda: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-2868Remote Code injection in Barracuda Email Security GatewayKEV
    95Now
  • CVE-2026-111560OS Command Injection in Barracuda AppliancesKEV
    66This week
  • CVE-2023-7102Remote Code Execution (RCE) Vulnerability
    60This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2026-116606 —
Proof-of-concept repository on GitHubstars:42026-11-03

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoCsame day
  3. CISA KEV+7 d
  4. TodayNov 13, 2026+11 d
EPSS, last 120 days+8% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-1115600 days apartOS Command Injection in Barracuda AppliancesKEV
    66This week

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-288 · Authentication Bypass Using an Alternate Path or Channel

CVSS 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/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Exploit maturitypoc → weaponized
  2. KEV✗ → ✓
  3. SSVC exploitationnone → active
  4. Exploit maturitynone → poc
  5. SSVC exploitation— → none
  6. Exploit maturity— → none

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References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records