# CVE-2026-111560 — Barracuda Email Security Gateway (ESG)

> As of 2026-11-03, CVE-2026-111560 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in Barracuda Email Security Gateway (ESG), CVSS v4.0 8.6, EPSS 0.4% (40.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-111560, most recently “Barracuda critical flaws (CVE-2026-116606, CVE-2026-111560) allow root access to ESG, ADC, Message Archiver, WAF and Web Security Gateway devices”.

**Last updated:** 2026-11-03

## What is CVE-2026-111560?

Improper neutralization of shell metacharacters in the timezone configuration field in certain Barracuda appliance products using common Barracuda code allows an authenticated administrator to inject OS commands that execute with root privileges when the crafted timezone value is subsequently processed.

The record classifies CVE-2026-111560 under weakness class [CWE-78](https://intel.threadlinqs.com/cwe/CWE-78). 6 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 2 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 8.6 — High (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 40.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-11-02, last modified 2026-11-03

## Is CVE-2026-111560 being exploited?

It currently carries a trending score of 45 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Barracuda Networks**: Barracuda Email Security Gateway (ESG), Barracuda Load Balancer Application Delivery Controller (ADC), Barracuda Web Application Firewall (WAF), Barracuda Web Security Gateway (WSG), Barracuda Message Archiver (BMA), Barracuda WAF Control Center (WCC)

## How to fix CVE-2026-111560

No vendor patch reference has been recorded for CVE-2026-111560 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-111560

1 tracked threat in the Threadlinqs corpus references CVE-2026-111560, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Barracuda critical flaws (CVE-2026-116606, CVE-2026-111560) allow root access to ESG, ADC, Message Archiver, WAF and Web Security Gateway devices](https://intel.threadlinqs.com/threat/TL-2026-5158) — CRITICAL · 2026-11-03

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-11-03. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [trust.barracuda.com — vendor advisory](https://trust.barracuda.com/security/pre-authentication-authorization-bypass-command-injection)

**Third-party advisory**

- [github.com — third party advisory](https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0041.md)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-111560
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