How severe is CVE-2021-41545?

CVE-2021-41545 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-41545 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41545?

CVE-2021-41545 primarily affects Siemens Desigo Dxr2 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-41545?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-41545 published?

CVE-2021-41545 was published on 2022-05-10 and last updated on 2026-06-17.

CVE-2021-41545

CVE-2021-41545 is a high-severity vulnerability in Siemens Desigo Dxr2 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-248.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-248
Affected product: Siemens Desigo Dxr2 Firmware
Published: 2022-05-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-41545?: 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.
How severe is CVE-2021-41545?: CVE-2021-41545 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-41545 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41545?: CVE-2021-41545 primarily affects Siemens Desigo Dxr2 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-41545?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-41545 published?: CVE-2021-41545 was published on 2022-05-10 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-662649.pdf

Affected products (4)

cpe:2.3:o:siemens:desigo_dxr2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:desigo_pxc3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:desigo_pxc4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:desigo_pxc5_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Desigo Dxr2 Firmware

CVE-2022-24042 — Critical (CVSS 9.1): A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions <…
CVE-2022-24044 — High (CVSS 7.5): A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions <…
CVE-2022-24045 — Medium (CVSS 6.5): A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions <…
CVE-2022-24041 — Medium (CVSS 6.5): A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions <…
CVE-2022-24040 — Medium (CVSS 6.5): A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions <…
CVE-2022-24043 — Medium (CVSS 5.3): A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions <…

All CVEs affecting Siemens Desigo Dxr2 Firmware →

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