CVE-2021-41545

mediumpriority · track · 30EPSS 0.009 · 60 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.93% (60th) EPSS

CVSS 5 · medium

Is it mine?

18 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedDesigo DXR2siemens_psirt
Update to V01.21.142.5-22 or later version. Please contact your local Siemens office for additional support in obtaining the update.
FixedDesigo PXC3siemens_psirt
Update to V01.21.142.4-18 or later version. Please contact your local Siemens office for additional support in obtaining the update.
FixedDesigo PXC4siemens_psirt
Update to V02.20.142.10-10884 or later version. Please contact your local Siemens office for additional support in obtaining the update.
FixedDesigo PXC5siemens_psirt
Update to V02.20.142.10-10884 or later version. Please contact your local Siemens office for additional support in obtaining the update.
FixedDesigo DXR2cisa_csaf_ot
Siemens recommends updating to the latest software version: Desigo DXR2: Update to v01.21.142.5-22 or later
FixedDesigo PXC3cisa_csaf_ot
Siemens recommends updating to the latest software version: Desigo PXC3: Update to v01.21.142.4-18 or later
FixedDesigo PXC4cisa_csaf_ot
Siemens recommends updating to the latest software version: Desigo PXC4: Update to v02.20.142.10-10884 or later
FixedDesigo PXC5cisa_csaf_ot
Siemens recommends updating to the latest software version: Desigo PXC5: Update to v02.20.142.10-10884 or later

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-248USCWE-248USCWE-248USCWE-248US

affected products (18)

Products and version ranges known to be affected.

Desigo DXR2: All versions prior to v01.21.142.5-22all versionscisa_csaf_otUS
Siemens Desigo DXR2< 01.21.142.5-22cisa_csaf_otUS
Siemens Desigo DXR2All versions → V01.21.142.5-22enisa_euvdEU
Siemens Desigo PXC3All versions → V01.21.142.4-18enisa_euvdEU
Siemens Desigo PXC4All versions → V02.20.142.10-10884enisa_euvdEU
Siemens Desigo PXC5All versions → V02.20.142.10-10884enisa_euvdEU
Siemens AG Desigo DXR2≤ 01.21.142.5-22fstec_bduRU
Siemens AG Desigo PXC3≤ 01.21.142.4-18fstec_bduRU
Siemens AG Desigo PXC4≤ 02.20.142.10-10884fstec_bduRU
Siemens AG Desigo PXC5≤ 02.20.142.10-10884fstec_bduRU
siemens desigo dxr2 firmware< 01.21.142.5-22nvdUScpe:2.3:o:siemens:desigo_dxr2_firmware:*:*:*:*:*:*:*:*
siemens desigo pxc3 firmware< 01.21.142.4-18nvdUScpe:2.3:o:siemens:desigo_pxc3_firmware:*:*:*:*:*:*:*:*
siemens desigo pxc4 firmware< 02.20.142.10-10884nvdUScpe:2.3:o:siemens:desigo_pxc4_firmware:*:*:*:*:*:*:*:*
siemens desigo pxc5 firmware< 02.20.142.10-10884nvdUScpe:2.3:o:siemens:desigo_pxc5_firmware:*:*:*:*:*:*:*:*
Siemens Desigo DXR2< V01.21.142.5-22siemens_psirtDE
Siemens Desigo PXC3< V01.21.142.4-18siemens_psirtDE
Siemens Desigo PXC4< V02.20.142.10-10884siemens_psirtDE
Siemens Desigo PXC5< V02.20.142.10-10884siemens_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-662649SSA-662649: Denial of Service Vulnerability in Desigo DXR and PXC Controllers2022-05-10csaf · siemens_psirtDE
A vulnerability in Desigo DXR and PXC controllers has been identified that could allow an attacker to disable and reset a device to factory state using a denial of service attack. Siemens has released updates for the affected products and recommends to update to the latest versions.
ICSA-22-132-10Siemens Desigo PXC and DXR Devices2022-05-12icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to potentially intercept unencrypted transmission of sensitive information, cause a denial-of-service condition, perform remote code execution, or disable and reset a device to factory state.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2022-05-10modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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