CVE-2026-2035 MEDIUM

CVE-2026-2035: Deciso OPNsense diag_backup.php filename Command Injection Remote Code Execution Vulnerability

Vendor Deciso
Product OPNsense
Weakness CWE-78
Published February 20, 2026
Last update February 24, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Adjacent
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Deciso OPNsense diag_backup.php filename Command Injection Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Deciso OPNsense. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of backup configuration files. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28131.

Key dates

02Disclosure timeline

February 20, 2026 CVE published
February 24, 2026 Record updated