Barracuda ESG flaws enable root access
Chained authorization bypass and command injection flaws let attackers gain root access to Barracuda Email Security Gateway and related products.
Sourceadvisories.ncsc.nl — open the original
What to check
- Applies to
- The 2 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2026-111560 and CVE-2026-116606 as exploited in the wild.
NCSC-NL published an advisory describing two vulnerabilities patched by Barracuda Networks affecting multiple products. CVE-2026-116606 is a pre-authentication authorization bypass in Barracuda Email Security Gateway (ESG), rated CVSS v4 9.3. CVE-2026-111560 is a command injection vulnerability affecting ESG as well as Load Balancer ADC, Message Archiver (BMA), WAF Control Center (WCC), Web Application Firewall (WAF), and Web Security Gateway (WSG), rated CVSS v4 8.6.
According to Barracuda, exploitation requires access to the administrative interface of a vulnerable product. When chained, the two flaws allow an attacker to bypass authorization controls and obtain root access to the device. No in-the-wild exploitation is mentioned in the advisory.
Barracuda has released security patches and firmware updates addressing both vulnerabilities. NCSC-NL recommends updating to the latest firmware and installing all available security updates, as well as restricting administrative interface access to trusted internal networks using appropriate network security controls.
Mentioned in this report
Source reporting: https://advisories.ncsc.nl/2026/ncsc-2026-0465.html
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