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Known exploited vulnerability

CVE-2026-111560

highCVSS 4.0 8.6In CISA KEVEPSS 1.1%Published · Barracuda Networks

The short answer

CVE-2026-111560 affects Barracuda Networks Barracuda Email Security Gateway (ESG) and is rated high (CVSS 8.6). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-11-10: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-78.

Severity

8.6 high

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/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

Exploited (CISA KEV)

Yes, since Nov 10, 2026

Federal due date Nov 13, 2026

EPSS, next 30 days

1.1%

Higher than 65% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
High
User interaction
None
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…

Affected products

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). NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-111560 being exploited?

Yes. CISA added CVE-2026-111560 to its Known Exploited Vulnerabilities catalog on 2026-11-10, with a federal remediation due date of 2026-11-13.

How do I fix CVE-2026-111560?

CISA's required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Undergoing Analysis. The description is NVD's text, quoted as published.

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