Historical catalog analysis: CISA added this entry on June 23, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2025-67038 is a code injection vulnerability (CWE-78, CWE-94) affecting the Lantronix EDS5000 series. The flaw allows an attacker to inject arbitrary operating system commands into the username parameter. Because these injected commands are executed with root privileges, a successful exploit could grant the attacker full administrative control over the device.
Exposure and applicability
This vulnerability applies to organizations utilizing Lantronix EDS5000 series device servers (including the EDS5008, EDS5016, and EDS5032 models). In industrial environments, these devices are typically used as serial-to-Ethernet bridges to connect legacy serial equipment—such as PLCs, sensors, or RTUs—to a modern IP network.
The risk is highest for devices that are exposed to untrusted networks where the username parameter can be reached. Asset owners should evaluate whether these device servers are placed in secure management VLANs or if they are accessible from broader corporate or external networks.
Remediation priorities
Based on our analysis, OT security leaders and controls engineers should prioritize the following actions:
- Firmware Update: The primary remediation is to apply the latest firmware provided by Lantronix for the EDS5000 series. This should be coordinated through standard change control processes to avoid unplanned downtime of serial communications.
- Network Isolation: For devices that cannot be immediately patched, we recommend ensuring they are isolated from non-essential network traffic. Restricting access to the device management interface to a limited set of authorized engineering workstations could reduce the likelihood of an attacker reaching the vulnerable parameter.
- Access Review: Audit all current deployments of EDS5000 series hardware to identify which units are internet-facing or reside on converged IT/OT boundaries, as these represent the highest immediate risk.
How to validate remediation
To verify that exposure has been reduced, operators should:
* Verify Firmware Version: Confirm that the installed firmware version matches the patched release specified in the vendor’s documentation. Note that a version check alone does not guarantee total security but confirms the application of the known fix.
* Configuration Audit: Review firewall rules and Access Control Lists (ACLs) to ensure that management traffic to the EDS5000 devices is restricted to authorized administrative hosts.
Limits and open questions
It remains unknown whether this vulnerability has been exploited by ransomware campaigns. Additionally, while CISA has provided a deadline for federal agencies, this date does not automatically apply to private sector asset owners; however, it serves as an indicator of the perceived urgency. Users should refer directly to Lantronix documentation to determine the specific firmware versions affected, as this information is not detailed in the CISA catalog entry.
Source and editorial note
CVE-2025-67038: Lantronix EDS5000 Code Injection Vulnerability · Source date: June 23, 2026 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: June 26, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 03, 2026 at 04:09 UTC.
Request an OT security assessment
Protect the systems your operations depend on.
Discuss your industrial environment, prioritize exposure, and establish evidence that safeguards work.
Request an OT assessment ↗