What’s Vulnerable › Vulnerabilities

CVE-2026-33390: Incorrect privilege assignment for Arc sensors in Guardian/CMC before 26.2.0

• Severity: high (CVSS 8.1 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: 2026-07-09 · updated 2026-08-11
• Weakness: CWE-266

Description

An Incorrect Privilege Assignment vulnerability was discovered in the synchronization functionality due to Arc sensors receiving CLI permissions. An authenticated user with limited privileges can push administrative CLI commands through the sync, altering the device configuration, and/or affecting its availability.

Affected products

• Nozomi Networks CMC: before 26.2.0 — fixed in 26.2.0
• Nozomi Networks Guardian: before 26.2.0 — fixed in 26.2.0

How to fix

Upgrade to a fixed version: Nozomi Networks CMC 26.2.0; Nozomi Networks Guardian 26.2.0. Check the vendor advisory for mitigations.

References

• https://security.nozominetworks.com/NN-2026:13-01
• https://cert-portal.siemens.com/productcert/html/ssa-827968.html

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