CVE-2026-12104 Overview
CVE-2026-12104 is an authenticated OS command injection vulnerability in SIMA GmbH Bondix through version 1.25.7.5 on Linux. The flaw resides in the environment and tunnel configuration functionality, where server-side scripts process user-supplied configuration values without proper sanitization. An attacker with configuration write access can pass crafted values that the underlying shell interprets as commands, leading to arbitrary command execution on the host. The issue is tracked under CWE-78 (Improper Neutralization of Special Elements used in an OS Command).
Critical Impact
Authenticated attackers with configuration write privileges can execute arbitrary operating system commands on the Bondix host, compromising confidentiality, integrity, and availability of the device and any connected network segments.
Affected Products
- SIMA GmbH Bondix through version 1.25.7.5
- Bondix environment configuration component on Linux
- Bondix tunnel configuration component on Linux
Discovery Timeline
- 2026-06-19 - CVE-2026-12104 published to NVD
- 2026-06-22 - Last updated in NVD database
Technical Details for CVE-2026-12104
Vulnerability Analysis
The vulnerability is an OS command injection flaw [CWE-78] in the Bondix management interface. Server-side scripts that handle environment variables and tunnel configuration parameters pass user-controlled values into shell contexts without adequate neutralization of metacharacters. When an authenticated administrator with write access submits configuration values containing shell separators such as ;, |, backticks, or $() constructs, the underlying interpreter executes the injected commands with the privileges of the configuration service.
The attack requires high privileges because configuration write access is gated by authentication. However, the network attack vector and low complexity mean any compromised administrative credential, stolen session, or insider with configuration rights can trigger full code execution. The EPSS score is 1.098% at the 61st percentile as of 2026-06-25.
Root Cause
The root cause is insufficient input validation and improper neutralization of shell metacharacters in configuration values before they are concatenated into shell commands invoked by server-side scripts. The Bondix backend treats configuration strings as trusted input and passes them directly to a command interpreter rather than using parameterized execution or strict allowlists.
Attack Vector
Exploitation occurs over the network against the Bondix management interface. The attacker authenticates with an account holding configuration write permissions and submits a crafted value in either the environment configuration or tunnel configuration fields. The malicious payload embeds shell control characters that break out of the intended argument context and execute arbitrary commands when the server-side script processes the configuration. Refer to the Bondix Security Advisory CVE-2026-12104 for vendor-supplied technical context.
Detection Methods for CVE-2026-12104
Indicators of Compromise
- Unexpected child processes spawned by the Bondix configuration or web service process on Linux hosts.
- Configuration change events containing shell metacharacters such as ;, |, `, or $( in environment or tunnel fields.
- Outbound network connections from the Bondix host to previously unseen IP addresses shortly after configuration updates.
- New or modified files in writable directories owned by the Bondix service account.
Detection Strategies
- Audit Bondix configuration change logs for values containing shell control characters or command substitution syntax.
- Monitor process trees on Bondix Linux hosts for execution of sh, bash, wget, curl, nc, or scripting interpreters as children of the Bondix service.
- Correlate administrative logins with subsequent process executions to identify abnormal command activity following configuration writes.
Monitoring Recommendations
- Forward Bondix application logs and Linux audit (auditd) records to a central SIEM for rule-based alerting on injection patterns.
- Alert on any execve calls from the Bondix service user that invoke shells or network utilities.
- Track failed and successful administrative authentication events to detect credential abuse against the management interface.
How to Mitigate CVE-2026-12104
Immediate Actions Required
- Restrict access to the Bondix management interface to trusted management networks using firewall rules or VPN gating.
- Rotate credentials for all accounts with configuration write access and enforce strong, unique passwords.
- Review recent configuration changes for evidence of injection attempts in environment and tunnel parameters.
- Apply the vendor-supplied patch as soon as it is available from SIMA GmbH.
Patch Information
SIMA GmbH publishes fixed versions and security advisories on its wiki. Consult the Bondix Release Notes for the latest fixed version superseding 1.25.7.5 and the Bondix Security Advisory CVE-2026-12104 for upgrade guidance.
Workarounds
- Limit configuration write permissions to the minimum required set of administrative users.
- Enforce multi-factor authentication on all Bondix administrative accounts where supported.
- Place the Bondix management interface behind a reverse proxy that filters requests containing shell metacharacters in configuration parameters.
- Implement network segmentation so that a compromised Bondix host cannot pivot to sensitive internal systems.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
