CVE-2020-28395: siemens scalance x-200rna switch family Use of Hard-coded Cryptographic Key
Vulnerability summary
CVE-2020-28395 is a medium (CVSS 5.9) Use of Hard-coded Cryptographic Key vulnerability in siemens scalance x-200rna switch family. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.4% of scored vulnerabilities.
Timeline
- 12-01-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.19%
Chance of exploitation in the next 30 days
Percentile
67%
Versus all other CVEs
30-day change
+0.01 pp
From 1.18% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Siemens10 products
- scalance x-200rna switch familyAll versions < V3.2.7
- scalance x-300 switch family (incl. x408 and siplus net variants)All versions < V4.1.0
- scalance_xr324-12m_firmware< 4.1.0
- scalance_xr324-12m_ts_firmware< 4.1.0
- scalance_xr324-4m_eec_firmware< 4.1.0
1 vendor · 10 products
References
2 links- cert-portal.siemens.com/productcert/pdf/ssa-274900.pdfVendor Advisory
us-cert.cisa.gov/ics/advisories/icsa-21-012-02Third Party AdvisoryUS Government ResourceVendor Advisory