What’s Vulnerable › Vulnerabilities

CVE-2026-33387: Insufficient sanitization of Dashboards in Guardian/CMC before 26.3.0

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-08 · updated 2026-10-15
• Weakness: CWE-1336

Description

A template injection vulnerability was discovered in the Dashboards functionality due to improper validation of an input parameter. An authenticated user with the required privileges can define a dashboard containing a malicious payload, or a victim can be socially engineered into importing a malicious dashboard. When the victim views or imports the dashboard, the payload executes in their browser context, allowing the attacker to modify application data or disrupt application availability.

Affected products

• Nozomi Networks CMC: before 26.3.0 — fixed in 26.3.0
• Nozomi Networks Guardian: before 26.3.0 — fixed in 26.3.0

How to fix

Upgrade to a fixed version: Nozomi Networks CMC 26.3.0; Nozomi Networks Guardian 26.3.0. Check the vendor advisory for mitigations.

References

• https://security.nozominetworks.com/NN-2026:16-01
• https://cert-portal.siemens.com/productcert/html/ssa-911336.html

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