CVE-2026-2035
Command Injection in OPNsense diag_backup.php Enables RCE
Publication date: 2026-02-20
Last updated on: 2026-02-20
Assigner: Zero Day Initiative
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| deciso | opnsense | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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. |
Attack-Flow Graph
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
I don't know
How can this vulnerability impact me? :
Exploiting this vulnerability allows an attacker to execute arbitrary code as the root user on the affected system. This can lead to full system compromise, including unauthorized access, data theft, modification or deletion of data, disruption of services, and potentially using the compromised system as a foothold to attack other systems within the network.
Can you explain this vulnerability to me?
This vulnerability exists in Deciso OPNsense's diag_backup.php file and is a command injection remote code execution flaw. It occurs because the software does not properly validate a user-supplied string before using it in a system call related to backup configuration files. An attacker who is network-adjacent and authenticated can exploit this flaw to execute arbitrary code with root privileges on the affected system.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know