CVE-2021-25671: Siemens RWG1.M12 Firmware

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability has been identified in RWG1.M12 (All versions < V1.16.16), RWG1.M12D (All versions < V1.16.16), RWG1.M8 (All versions < V1.16.16). Sending specially crafted ARP packets to an affected device could cause a partial denial-of-service, preventing the device to operate normally. A restart is needed to restore normal operations.

Affected products

• Siemens RWG1.M12 Firmware: before 1.16.16 (fixed in 1.16.16)
• Siemens RWG1.M12D Firmware: before 1.16.16 (fixed in 1.16.16)
• Siemens RWG1.M8 Firmware: before 1.16.16 (fixed in 1.16.16)

Published 2021-07-13. Last modified 2026-06-17.