Is CVE-2026-2035 actively exploited?

No active exploitation of CVE-2026-2035 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-2035 be exploited remotely?

Partially. CVE-2026-2035 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-2035?

CVE-2026-2035 has a CVSS score of 6.8 (MEDIUM) and an EPSS exploitation probability of 0.21%.

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MEDIUM

CVE-2026-2035

CWE-78Published: February 20, 2026· Updated: Feb 23, 2026

6.8

CVSS v3.1

EPSS:0.17%probability of exploitation in 30 daysPercentile:37.6th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-2035 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.