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CVE-2026-2035

MEDIUMCVSS 6.8/10EPSS 1.54%

Last modified

CVE-2026-2035 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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. EPSS estimates a 1.54% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.0
6.8/10

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

EPSS Probability
1.54%

71.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-2035?
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.
How severe is CVE-2026-2035?
CVE-2026-2035 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.
How do I fix CVE-2026-2035?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2035?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST