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CVE-2025-40900: Angular template injection in Reports in Guardian/CMC before 26.1.0

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-19 · updated 2026-10-14
• Weakness: CWE-1336

Description

An Angular template injection vulnerability was discovered in the Reports functionality due to improper validation of an input parameter. An authenticated user with report privileges can define a malicious report containing an Angular template payload, or a victim can be socially engineered to import a malicious report template. When the victim views or imports the report, the Angular template executes in their browser context, allowing the attacker to modify application data, or disrupt application availability. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.

Affected products

• Nozomi Networks CMC: before 26.1.0 — fixed in 26.1.0
• Nozomi Networks Guardian: before 26.1.0 — fixed in 26.1.0

How to fix

Upgrade to a fixed version: Nozomi Networks CMC 26.1.0; Nozomi Networks Guardian 26.1.0. Check the vendor advisory for mitigations.

References

• https://security.nozominetworks.com/NN-2026:3-01
• https://cert-portal.siemens.com/productcert/html/ssa-827968.html

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