Security Advisory – E210 and E220 Series Firmware Update

Date: June 29, 2026

Overview

Lantronix has addressed multiple security vulnerabilities affecting the E210 and E220 Series Router. These vulnerabilities could allow an attacker to perform unauthorized actions under specific conditions.

The following CVEs are addressed by firmware release 3.21.0.0R1 published on June 29^th, 2026.

• CVE-2025-67038

Recommended Actions

• Upgrade to firmware version 3.21.0.0R1 or later.
• Download the latest firmware and release notes:
  • E210 Series
  • E220 Series

Interim Mitigation 

• Replace default credentials, and prohibit weak passwords, to reduce the risk of brute force attacks and exploitation of authenticated vulnerabilities.
• Restrict network access to affected devices.
• Place affected devices behind a firewall.
• Limit management interfaces to trusted networks only.

Support

For technical assistance or questions regarding this advisory, please contact:

Email: [email protected]
Alternative Contact (if applicable): [email protected]