BACnet Communication Disruption in Siemens Desigo Controllers
CVE-2021-41545

7.5HIGH

Key Information:

Vendor

Siemens
Status
Desigo Dxr2
Desigo Pxc3
Desigo Pxc4
Desigo Pxc5
Vendor
CVE Published:
10 May 2022

What is CVE-2021-41545?

A vulnerability exists in Siemens' Desigo controllers, where a specific BACnet protocol packet leads to a failure of the BACnet communication function. This results in the system entering an 'out of work' state and can cause the controller to revert to its factory settings, creating potential operational disruptions.

Affected Version(s)

Desigo DXR2 All versions < V01.21.142.5-22

Desigo PXC3 All versions < V01.21.142.4-18

Desigo PXC4 All versions < V02.20.142.10-10884

References

https://cert-portal.siemens.com/productcert/pdf/ssa-66264...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.