CVE-2026-33923

High

Description

A signature verification vulnerability was discovered in the update installation functionality due to inconsistent validation of the update bundle contents. An attacker with administrative privileges can remotely supply a crafted update bundle that passes signature verification but runs an unsigned script when the bundle is installed. The script runs with root privileges, allowing the attacker to read or modify sensitive data, change the appliance configuration, or shut down the appliance.

SeverityHigh
CVSS7.2
Exploit probability—
ProductGuardian
PublishedOct 29, 2026
First seenNov 4, 2026
Weakness typeCWE-347CWE-347

How to fix

Update
  • Nozomi Networks Guardian26.4.0 or later
  • Nozomi Networks CMC26.4.0 or later

Affected products

ProductAffected versionsFixed in
Nozomi Networks Guardianv < 26.4.026.4.0
Nozomi Networks CMCv < 26.4.026.4.0

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