CVE-2026-44193Public exploitNetwork attack vector

Authenticated root command execution via unescaped username

Published May 13, 2026 · Updated May 13, 2026

Command injection in Deciso B.V. OPNsense core before 26.1.7 allows remote authenticated users to execute commands as root via XMLRPC. The opnsense.restore_config_section method accepts a crafted user name, and local_user_set interpolates it unescaped into a pw command passed to popen. Access requires an account with XMLRPC Library privileges; restoring the system user section and reloading services executes the injected shell syntax on the firewall host.

CVSS severity9.1
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Deciso B.V. OPNsense core before 26.1.7 allows remote authenticated users to execute commands as root via XMLRPC. The opnsense.restore_config_section method accepts a crafted user name, and local_user_set interpolates it unescaped into a pw command passed to popen. Access requires an account with XMLRPC Library privileges; restoring the system user section and reloading services executes the injected shell syntax on the firewall host.

The record

CVE
CVE-2026-44193
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Deciso B.V.
Product
core
Classifications
CWE-88, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 26.1.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Deciso B.V. · coreversion=< 26.1.7

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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