CVE-2020-28393

HIGH

SCALANCE XM-400, XR-500 Firmware < 6.4 - Unauthenticated Denial of Service via OSPF Packet

Title source: llm
STIX 2.1

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).

References (2)

Core 2
Core References
Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10

Scores

CVSS v3 7.5
EPSS 0.0163
EPSS Percentile 73.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-682
Status published
Products (11)
siemens/scalance_xm-400_firmware < 6.4
siemens/scalance_xm408-4c_firmware < 6.4
siemens/scalance_xm408-4c_l3_firmware < 6.4
siemens/scalance_xm408-8c_firmware < 6.4
siemens/scalance_xm408-8c_l3_firmware < 6.4
siemens/scalance_xm416-4c_firmware < 6.4
siemens/scalance_xm416-4c_l3_firmware < 6.4
siemens/scalance_xr524_firmware < 6.4
siemens/scalance_xr526_firmware < 6.4
siemens/scalance_xr528_firmware < 6.4
... and 1 more
Published May 12, 2021
Tracked Since Feb 18, 2026