CVE-2021-35978: Digi Transport DR64 Firmware

Critical severity, CVSS 9.8. EPSS: 3.7% chance of exploitation in the next 30 days.

An issue was discovered in Digi TransPort DR64, SR44 VC74, and WR. The ZING protocol allows arbitrary remote command execution with SUPER privileges. This allows an attacker (with knowledge of the protocol) to execute arbitrary code on the controller including overwriting firmware, adding/removing users, disabling the internal firewall, etc.

Affected products

• Digi Transport DR64 Firmware: up to and including 5.2.4.9
• Digi Transport SR44 Firmware: any version
• Digi Transport VC74 Firmware: up to and including 5.2.4.9
• Digi Transport WR11 Firmware: up to and including 8.2.1.3
• Digi Transport WR11 Xt Firmware: up to and including 8.2.1.3
• Digi Transport WR21 Firmware: up to and including 8.2.1.3
• Digi Transport WR31 Firmware: up to and including 8.2.1.3
• Digi Transport WR41 Firmware: from 5.0.0.0, up to and including 5.2.4.6; from 6.0.0.0, up to and including 6.1.3.5; from 8.0.0.0, up to and including 8.3.1.2
• Digi Transport WR44 Firmware: up to and including 8.3.1.2

Published 2021-12-10. Last modified 2026-06-17.