What’s Vulnerable › Vulnerabilities

CVE-2026-33391: Incorrect authorization in Smart Polling configuration in Guardian/CMC before 26.3.0

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-863

Description

An access control vulnerability was discovered in the Smart Polling configuration functionality due to insufficient validation of user privileges. An authenticated user with limited privileges can remotely bypass the intended access control of the web management interface and modify the Smart Polling discovery configuration. This allows the attacker to disrupt the visibility of assets in the monitored network.

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-2026:17-01
• https://cert-portal.siemens.com/productcert/html/ssa-911336.html

Get alerted when CVE-2026-33391 or the next vulnerability affects your stack