What’s Vulnerable › Vulnerabilities

CVE-2026-33920: Cross-site request forgery in the Guardian/CMC login before 26.3.0

• Severity: low (CVSS 3.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% 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-352

Description

A cross-site request forgery vulnerability was discovered in the login functionality (both standard and SAML) due to missing validation of the anti-CSRF token. An attacker with a valid account can trick a victim into unknowingly authenticating with the attacker's credentials. Any operation performed by the victim in this state is attributed to the attacker's account, compromising the integrity of the audit trail.

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-2026:18-01
• https://cert-portal.siemens.com/productcert/html/ssa-911336.html

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