CVE-2020-28393
A vulnerability has been identified in SCALANCE XM-400 Family (All versions < V6.4), SCALANCE XR...
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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).
- Record
CVE-2020-28393- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:N/I:N/A:C - Weakness
- CWE-682
- Updated
- 2026-11-02
CVE List No score
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).
- Record
CVE-2020-28393- Weakness
- CWE-682
- Updated
- 2026-11-02
EUVDEUVD-2020-20852 No score
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).
- Record
EUVD-2020-20852- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q5c9-w6w2-m4fw No score
A vulnerability has been identified in SCALANCE XM-400 Family (All versions < V6.4), SCALANCE XR...
A vulnerability has been identified in SCALANCE XM-400 Family (All versions < V6.4), SCALANCE XR-500 Family (All versions < V6.4). The OSPF protocol implementation in affected devices incorrectly handles the number of LSA fields in combination with other modified fields. 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.
- Record
GHSA-q5c9-w6w2-m4fw- Weakness
- CWE-682
- Updated
- 2026-11-02
Affected products
- siemens scalance xm-400 firmware
- siemens scalance xm408-4c firmware
- siemens scalance xm408-4c l3 firmware
- siemens scalance xm408-8c firmware
- siemens scalance xm408-8c l3 firmware
- siemens scalance xm416-4c firmware
- siemens scalance xm416-4c l3 firmware
- siemens scalance xr524 firmware
- siemens scalance xr526 firmware
- siemens scalance xr528 firmware
- siemens scalance xr552 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28393 is a high vulnerability (CVSS 7.5) in Siemens Scalance Xm-400 Firmware, published May 12, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.63%, the 76th percentile. No source names a fixed version.