Nozomi Guardian/CMC up to 26.3.x Update os command injection

Summaryinfo

A vulnerability identified as very critical has been detected in Nozomi Guardian and CMC up to 26.3.x. This affects an unknown part of the component Update Handler. This manipulation causes os command injection. This vulnerability appears as CVE-2026-33924. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Nozomi Guardian and CMC up to 26.3.x. It has been declared as very critical. Affected by this vulnerability is some unknown functionality of the component Update Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Two OS command injection vulnerabilities were discovered in the update installation functionality due to insufficient validation of the update bundle contents. An attacker with administrative privileges can remotely supply a crafted update bundle that, when installed, causes arbitrary commands to be executed with root privileges, allowing the attacker to read or modify sensitive data, change the appliance configuration, or shut down the appliance.

The advisory is shared at security.nozominetworks.com. This vulnerability is known as CVE-2026-33924 since 03/24/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are necessary for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/29/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version 26.4.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Nozomi

Name

• CMC
• Guardian

Version

• 26.0
• 26.1
• 26.2
• 26.3

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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