CVE-2021-25671

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-13 · updated 2026-06-17
Weakness: CWE-770

Description

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

How to fix

Upgrade to a fixed version: Siemens Rwg1.M12 Firmware 1.16.16; Siemens Rwg1.M12D Firmware 1.16.16; Siemens Rwg1.M8 Firmware 1.16.16. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-25671 or the next vulnerability affects your stack