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Vulnerabilities

Vulnerability · CVE-2026-2035

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

Published Feb 20, 2026 · catalog updated Jun 17, 2026 · Deciso OPNsense diag_backup.php filename

Check if you run it

No confirmed exploitation is on record for CVE-2026-2035. EPSS is 1.53%. Act only if a listed version of Deciso OPNsense diag_backup.php filename is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Deciso OPNsense diag_backup.php filename).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.53%
Remediation
Not established
Affected products
See sources for product scope

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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-2035

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-2035. EPSS is 1.53%. Act only if a listed version of Deciso OPNsense diag_backup.php filename is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 1.53%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 20, 2026 · NIST NVD

    Detected

    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 val

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 val

Sources

  • CVE.orgVulnerability recordCVE-2026-2035

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-2035

    30-day exploitation probability 1.5%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.