A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions < V01.21.142.4-18), Desigo P…

published 2022-05-10 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28563

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

A vulnerability has been identified in 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), Desigo PXC5 (All versions < V02.20.142.10-10884). When the controller receives a specific BACnet protocol packet, an exception causes the BACnet communication function to go into a “out of work” state and could result in the controller going into a “factory reset” state.

Patch / fix

fixed in 4

siemens desigo_dxr2_firmware 01.21.142.5-22
siemens desigo_pxc3_firmware 01.21.142.4-18
siemens desigo_pxc4_firmware 02.20.142.10-10884
siemens desigo_pxc5_firmware 02.20.142.10-10884

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-132-10 updated 2022-06-16 cvss 7.5

Siemens Desigo PXC and DXR Devices

Siemens Desigo DXR2 < 01.21.142.5-22
affected: fixed in v01.21.142.5-22 siemens.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

Siemens Desigo DXR2
Siemens Desigo PXC3
Siemens Desigo PXC4
Siemens Desigo PXC5

Classification

Weakness

CWE-248 Uncaught Exception

References

cert-portal.siemens.com /productcert/pdf/ssa-662649.pdf
vendor-advisory

Sources

CVE List CVE-2021-41545
NVD CVE-2021-41545

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary