CVE-2020-28393
HIGH
7.5
CVSS Score
Published: May 12, 2021 at 01:18 PM UTC
Updated: June 17, 2026 at 03:10 AM UTC
23 products affected across 1 vendorScalance Xm416-4c FirmwareScalance Xm408-4c L3 FirmwareScalance Xm416-4c L3 Firmware
Using SCALANCE XM-400, XR-500 by N/A?
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
Description
An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device on the SCALANCE XM-400, XR-500 (All versions prior to v6.4).
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xm-400 (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xm408-4c (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xm408-4c-l3 (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xm408-8c (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xm408-8c-l3 (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xm416-4c (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xm416-4c-l3 (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xr524 (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xr526 (same device)
v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
siemens-scalance-xr528 (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdfx_refsource_MISCThird Party AdvisoryUS Government Resource
Source: [email protected]
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-682
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