CVE-2026-82779: CONPROSYS TM Series RCE Vulnerability

CVE-2026-82779 Overview

CVE-2026-82779 is an OS command injection vulnerability [CWE-78] affecting the CONPROSYS TM Series from Contec. The flaw stems from improper neutralization of special elements passed to operating system commands. An authenticated attacker who can log in to the product can execute arbitrary OS commands on the underlying device. CONPROSYS TM Series products are industrial IoT gateways used in operational technology (OT) environments, making command execution on these devices a direct path into industrial control networks.

Critical Impact

An authenticated remote attacker can execute arbitrary operating system commands, gaining full control over affected CONPROSYS TM Series devices and potentially pivoting into connected OT networks.

Affected Products

• Contec CONPROSYS TM Series (industrial IoT gateway devices)
• Refer to the Contec Security Information Document for the specific model and firmware list
• Refer to the JVN Security Vulnerability Notice for advisory coordination details

Discovery Timeline

• 2026-09-14 - CVE-2026-82779 published to NVD
• 2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-82779

Vulnerability Analysis

The vulnerability is classified under [CWE-78], improper neutralization of special elements used in an OS command. CONPROSYS TM Series firmware passes attacker-controllable input into an OS command interpreter without adequate sanitization or the use of parameterized execution APIs. When a logged-in user submits crafted input containing shell metacharacters such as ;, |, &, or backticks, the input is concatenated into a shell command and executed on the device.

Successful exploitation grants command execution in the security context of the process that invokes the shell. On embedded Linux-based gateway devices, this frequently means elevated or root-equivalent privileges, providing complete control over the device configuration, running services, and network interfaces.

Root Cause

The root cause is unsafe construction of shell commands from user-supplied parameters within an authenticated interface of the CONPROSYS TM Series firmware. The application invokes the operating system shell without validating input against an allowlist or escaping shell metacharacters. See the Contec Security Information Document for vendor-confirmed technical scope.

Attack Vector

Exploitation requires network access to the product and valid login credentials. Once authenticated, the attacker submits a request containing shell metacharacters in a parameter that reaches the vulnerable OS command execution path. The device then runs the injected command. Weak, default, or shared credentials on internet-exposed CONPROSYS devices materially lower the bar for exploitation. The EPSS score for this CVE is 1.023% as of 2026-09-18.

No verified public proof-of-concept is available at this time.
Refer to the JVN and Contec advisories for authoritative technical details.

Detection Methods for CVE-2026-82779

Indicators of Compromise

• Unexpected child processes spawned by the CONPROSYS TM Series web or management service, particularly sh, bash, busybox, wget, curl, or nc.
• Outbound network connections from the device to unfamiliar IP addresses following authenticated management sessions.
• New or modified startup scripts, cron entries, or persistence files on the device filesystem.
• Authentication logs showing successful logins from unexpected source IPs preceding command execution telemetry.

Detection Strategies

• Inspect HTTP request bodies and query parameters sent to the CONPROSYS management interface for shell metacharacters including ;, |, &&, `, and $(.
• Correlate authenticated session events with process-creation telemetry on the device or upstream network sensors.
• Deploy OT-aware network monitoring to identify anomalous command-and-control traffic originating from industrial gateways.

Monitoring Recommendations

• Forward device syslog and authentication events to a centralized SIEM for retention and correlation.
• Baseline normal outbound connections from CONPROSYS gateways and alert on deviations.
• Monitor for repeated authentication failures followed by a successful login, which may indicate credential brute force preceding exploitation.

How to Mitigate CVE-2026-82779

Immediate Actions Required

• Apply the firmware update published by Contec as referenced in the Contec Security Information Document.
• Rotate all account credentials on affected CONPROSYS TM Series devices and remove any shared or default accounts.
• Restrict management interface access to a dedicated administrative network segment using firewall rules.
• Audit authentication and command execution logs for indicators of prior exploitation.

Patch Information

Contec has published a security information document describing the affected products and remediation. Administrators should consult the JVN Security Vulnerability Notice and the Contec Security Information Document for the fixed firmware version and upgrade procedure specific to each model.

Workarounds

• Block network access to the CONPROSYS management interface from untrusted networks, including the internet, using an upstream firewall or ACL.
• Enforce strong, unique passwords and disable any unused accounts on affected devices.
• Place CONPROSYS TM Series devices behind a VPN or jump host so that authentication to the device requires prior network-layer authentication.
• Monitor device behavior continuously until the vendor firmware update can be validated and deployed in the production environment.

# Example upstream firewall rule to restrict CONPROSYS management access
# Replace <MGMT_SUBNET> and <DEVICE_IP> with environment-specific values
iptables -A FORWARD -s <MGMT_SUBNET> -d <DEVICE_IP> -p tcp --dport 443 -j ACCEPT
iptables -A FORWARD -d <DEVICE_IP> -p tcp --dport 443 -j DROP