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CVE-2025-67038: Lantronix EDS5000 Code Injection Vulnerability

CVE-2025-67038 is rated critical with a CVSS v3.1 base score of 9.8 and affects Lantronix EDS5000, along with 33 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-06-23, which means exploitation in the wild has been observed.

Vulnerability description

An issue was discovered in Lantronix EDS5000 2.1.0.0R3. The HTTP RPC module executes a shell command to write logs when user's authentication fails. The username is directly concatenated with the command without any sanitization. This allow attackers to inject arbitrary OS commands into the username parameter. Injected commands are executed with root privileges.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-78: Improper Neutralization of Special Elements used in an OS Command

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.

Affected products

  • Lantronix Eds5008 Firmware: before 2.2.0.0r1
  • Lantronix Eds5016 Firmware: before 2.2.0.0r1
  • Lantronix Eds5032 Firmware: before 2.2.0.0r1
  • Lantronix G526gp12s Firmware: before 2.6.0.4R6
  • Lantronix G526gp17s Firmware: before 2.6.0.4R6
  • Lantronix G526gp1cs Firmware: before 2.6.0.4R6
  • Lantronix G526gp1asg Firmware: before 2.6.0.4R6
  • Lantronix G526gp1as Firmware: before 2.6.0.4R6
  • Lantronix G527gp22s Firmware: before 2.6.0.4R6
  • Lantronix G527gp27s Firmware: before 2.6.0.4R6
  • Lantronix G527gp2as Firmware: before 2.6.0.4R6
  • Lantronix G527gp2asg Firmware: before 2.6.0.4R6
  • Lantronix G528gp2fs Firmware: before 2.6.0.4R6
  • Lantronix G528gp2fsg Firmware: before 2.6.0.4R6
  • Lantronix G528gp2fsgc Firmware: before 2.6.0.4R6

References