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No exploitation reportedFix available

CVE-2021-41545

No exploitation reported by the sources we read.

  • Published2022-05-10
  • Fixed in01.21.142.5-22
  • WeaknessCWE-248

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-05-1011:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-41545?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-41545?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Siemens desigo dxr2 firmwareversion to verify
BranchAffectedFixed in
1.21< 01.21.142.5-2201.21.142.5-22
Siemens desigo pxc3 firmwareversion to verify
BranchAffectedFixed in
1.21< 01.21.142.4-1801.21.142.4-18
Siemens desigo pxc4 firmwareversion to verify
BranchAffectedFixed in
2.20< 02.20.142.10-1088402.20.142.10-10884

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-22-132-10 CISA1 known affected

    Siemens Desigo PXC and DXR Devices

    Desigo DXR2: All versions prior to v01.21.142.5-22

Full record on NVD

Fix

  1. Update Siemens desigo dxr2 firmware to 01.21.142.5-22
  2. Vendor fix CISA ICSA-22-132-10 · 1 productSiemens recommends updating to the latest software version: Desigo DXR2: Update to v01.21.142.5-22 or later
  3. Vendor fix CISA ICSA-22-132-10 · 1 productSiemens recommends updating to the latest software version: Desigo PXC3: Update to v01.21.142.4-18 or later
  4. Vendor fix CISA ICSA-22-132-10 · 1 productSiemens recommends updating to the latest software version: Desigo PXC4: Update to v02.20.142.10-10884 or later
  5. Vendor fix CISA ICSA-22-132-10 · 1 productSiemens recommends updating to the latest software version: Desigo PXC5: Update to v02.20.142.10-10884 or later
  6. Vendor fix CISA ICSA-22-132-10 · 4 productsContact Siemens for update information.
  7. Vendor fix CISA ICSA-22-132-10 · 4 productsAs a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens ' operational guidelines for industrial security and followin…

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-248read 2026-10-23
  • FIRST EPSSEPSS score0.9 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2022-05-10
Last Modified
2026-06-17
NVD status
Modified

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.

Is CVE-2021-41545 actively exploited?

Active exploitation of CVE-2021-41545 has not been confirmed. Its EPSS score was 0.9% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-41545?

CVE-2021-41545 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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