# Email Security Gateway 800 Firmware vulnerabilities > Email Security Gateway 800 Firmware is made by Barracuda. We track 2 published vulnerabilities in it, across 2 versions. 3 of them are on the list of flaws known to be exploited, the newest added on 10 November 2026. If you run Email Security Gateway 800 Firmware, check your version against the exploited flaws below and patch those first. Canonical page: https://www.edgeprotect.io/product/barracuda/email_security_gateway_800_firmware ## At a glance - **Made by:** [Barracuda](https://www.edgeprotect.io/vendors/barracuda) - **Published vulnerabilities:** 2 - **Known to be exploited:** 3 - **Versions tracked:** 2 - **Most recently added to the known-exploited list:** [CVE-2026-111560](https://www.edgeprotect.io/what-is/cve-2026-111560), 10 November 2026. We keep watching the list. ## Which versions of Email Security Gateway 800 Firmware do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "before 9.4.0.029" means every version up to, but not including, 9.4.0.029. - [CVE-2026-111560](https://www.edgeprotect.io/what-is/cve-2026-111560) (Barracuda Networks Multiple Products OS Command Injection Vulnerability): before 9.4.0.029 - [CVE-2026-116606](https://www.edgeprotect.io/what-is/cve-2026-116606) (Barracuda Networks Email Security Gateway (ESG) Authentication Bypass Using an Alternate Path or Channel Vulnerability): before 9.4.0.030 - [CVE-2023-2868](https://www.edgeprotect.io/what-is/cve-2023-2868) (Barracuda Networks ESG Appliance Improper Input Validation Vulnerability): 5.1.3.001 to 9.2.0.006 ## Which Email Security Gateway 800 Firmware vulnerabilities are being exploited? 3 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2026-111560](https://www.edgeprotect.io/what-is/cve-2026-111560): Barracuda Networks Multiple Products OS Command Injection Vulnerability. High, CVSS 8.6, chance of use in 30 days 9.1%, known exploited since 10 November 2026. - [CVE-2026-116606](https://www.edgeprotect.io/what-is/cve-2026-116606): Barracuda Networks Email Security Gateway (ESG) Authentication Bypass Using an Alternate Path or Channel Vulnerability. Critical, CVSS 9.3, chance of use in 30 days 11%, known exploited since 10 November 2026. - [CVE-2023-2868](https://www.edgeprotect.io/what-is/cve-2023-2868): Barracuda Networks ESG Appliance Improper Input Validation Vulnerability. Critical, CVSS 9.4, chance of use in 30 days 87%, known exploited since 26 May 2023. ## Which Email Security Gateway 800 Firmware flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2023-2868](https://www.edgeprotect.io/what-is/cve-2023-2868): 87%, Critical (CVSS 9.4), known exploited - [CVE-2023-7102](https://www.edgeprotect.io/what-is/cve-2023-7102): 45%, Critical (CVSS 9.8) - [CVE-2026-116606](https://www.edgeprotect.io/what-is/cve-2026-116606): 11%, Critical (CVSS 9.3), known exploited - [CVE-2026-111560](https://www.edgeprotect.io/what-is/cve-2026-111560): 9.1%, High (CVSS 8.6), known exploited ## Questions ### How many vulnerabilities does Email Security Gateway 800 Firmware have? We track 2 published vulnerabilities listed under the name Email Security Gateway 800 Firmware, across 2 versions. The most recent Email Security Gateway 800 Firmware flaw added to the known-exploited list is CVE-2026-111560, on 10 November 2026. ### Which Email Security Gateway 800 Firmware vulnerabilities are being exploited? 3 are on the list of flaws known to be exploited. The most recently added are CVE-2026-111560, CVE-2026-116606 and CVE-2023-2868. ### Which versions of Email Security Gateway 800 Firmware do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2026-111560, affects before 9.4.0.029. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Email Security Gateway 800 Firmware? Create a EdgeProtect account and track Email Security Gateway 800 Firmware. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running Email Security Gateway 800 Firmware? EdgeProtect keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.edgeprotect.io/register Book a demo: https://www.edgeprotect.io/contact