CVE-2020-28395

Name: CVE-2020-28395
Creator: NVD / NIST
Published: 2021-01-12T21:15:18.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2020-28395 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. A vulnerability has been identified in SCALANCE X-200RNA switch family (All versions < V3.2.7), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < V4.1.0). EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in SCALANCE X-200RNA switch family (All versions < V3.2.7), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < V4.1.0). Devices do not create a new unique private key after factory reset. An attacker could leverage this situation to a man-in-the-middle situation and decrypt previously captured traffic.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

1.18%

63.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Siemens	Scalance Xr324-12m Firmware	< 4.1.0
Siemens	Scalance Xr324-12m Ts Firmware	< 4.1.0
Siemens	Scalance Xr324-4m Eec Firmware	< 4.1.0
Siemens	Scalance Xr324-4m Poe Firmware	< 4.1.0
Siemens	Scalance Xr324-4m Poe Ts Firmware	< 4.1.0
Siemens	Scalance Xr324wg Firmware	< 4.1.0
Siemens	Scalance Xr326-2c Poe Wg Firmware	< 4.1.0
Siemens	Scalance Xr328-4c Wg Firmware	< 4.1.0

References

https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdfVendor Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02Third Party Advisory, US Government Resource, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdfVendor Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02Third Party Advisory, US Government Resource, Vendor Advisory

Timeline

Published: Jan 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28395?

How severe is CVE-2020-28395?

CVE-2020-28395 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28395?

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-2020-28395?

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

Scan your code now

Source: NVD / NIST