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PHP CVE-2026-2035

MEDIUM
OS Command Injection (CWE-78)
2026-02-20 zdi-disclosures@trendmicro.com
6.8
CVSS 3.0 · NVD
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Severity by source

NVD PRIMARY
6.8 MEDIUM
AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:04 vuln.today
CVE Published
Feb 20, 2026 - 23:16 nvd
MEDIUM 6.8

DescriptionCVE.org

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.

AnalysisAI

Remote code execution in Deciso OPNsense's backup functionality allows authenticated network-adjacent attackers to execute arbitrary commands with root privileges through insufficient input validation in the diag_backup.php file. An attacker with valid credentials can inject malicious commands into backup filename parameters to achieve code execution on the affected system. No patch is currently available for this vulnerability.

Technical ContextAI

Classified as CWE-78 (OS Command Injection). 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 leverag

Affected ProductsAI

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

RemediationAI

Monitor vendor advisories for a patch.

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CVE-2026-2035 vulnerability details – vuln.today

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