CVE-2021-25671

Name: CVE-2021-25671
Creator: NVD / NIST
Published: 2021-07-13T11:15:09.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.38%

Last modified Jun 17, 2026

CVE-2021-25671 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.38% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Probability

0.38%

29.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Siemens	Rwg1.M12 Firmware	< 1.16.16
Siemens	Rwg1.M12d Firmware	< 1.16.16
Siemens	Rwg1.M8 Firmware	< 1.16.16

References

https://cert-portal.siemens.com/productcert/pdf/ssa-448291.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-448291.pdfPatch, Vendor Advisory

Timeline

Published: Jul 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25671?

How severe is CVE-2021-25671?

CVE-2021-25671 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.38% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25671?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25671?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST