CVE-2020-28391
Reported by siemens · Published January 12, 2021
A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0), SCALANCE X-200RNA switch family (All versions < V3.2.7). Devices create a new unique key upon factory reset, except when used with C-PLUG. When used with C-PLUG the devices use the hardcoded private RSA-key shipped with the firmware-image. An attacker could leverage this situation to a man-in-the-middle situation and decrypt previously captured traffic.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| scalance_xc208g_firmware | siemens | 5.2.5 |
| scalance_xc216-4c_g_\(e\/ip\)_firmware | siemens | 5.2.5 |
| scalance_x201-3pirt_firmware | siemens | 5.5.0 |
| scalance_xb213-3_firmware | siemens | 5.2.5 |
| scalance_xc216-4c_g_eec_firmware | siemens | 5.2.5 |
| scalance_xf204-2_firmware | siemens | 5.2.5 |
| scalance_xf204_firmware | siemens | 5.2.5 |
| scalance_xc224-4c_g_\(e\/ip\)_firmware | siemens | 5.2.5 |
| scalance_x204irt_firmware | siemens | 5.5.0 |
| scalance_x202-2pirt_firmware | siemens | 5.5.0 |
| scalance_xc208_firmware | siemens | 5.2.5 |
| scalance_xb208_firmware | siemens | 5.2.5 |
2 more packages have a fixed version. See every fix in Lookup.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SCALANCE X-200 switch family (incl. SIPLUS NET variants) | All versions < V5.2.5 |
| Siemens | SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) | All versions < V5.5.0 |
| Siemens | SCALANCE X-200RNA switch family | All versions < V3.2.7 |
| Siemens | SCALANCE X-200 switch family (incl. SIPLUS NET variants) | * |
| Siemens | SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) | * |
| Siemens | SCALANCE X-200RNA switch family | * |
Timeline
- Jan 12, 2021 CVE Published
- Apr 14, 2021 EPSS Score (30 in total, the first dated here)
- Apr 4, 2026 Security Advisory
- Jun 17, 2026 CVE Updated
- Sep 1, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2020-28391
vulnetix vdb fixes CVE-2020-28391Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2020-28391/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart