CVE-2026-2035CWE-78

Deciso OPNsense diag_backup.php filename Command Injection Remote Code Execution Vulnerability

Medium · published February 20, 2026

CVSS v3.0
6.8
EPSS
2%
Percentile
75.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
6.8 · MEDIUM
Vector
CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01590 · 75.5th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-02-20T22:13Z
EPSS history
Timeline
  • 20 FEB 22:13Z
    Deciso OPNsense diag_backup.php filename Command Injection Remote Code Execution Vulnerability
    cvelistv5