Vulnerability Monitor

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CVE-2021-20999


In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.


Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.4, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 8 products from weidmueller, from weidmueller, from weidmueller and 5 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-05-13T14:15:18.150

Last Modified

2024-11-21T05:47:22.467

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.4 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

6.4

Weaknesses
  • Type: Secondary
    CWE-668
  • Type: Primary
    NVD-CWE-Other

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System weidmueller uc20-wl2000-ac_firmware < 1.9.1 Yes
Operating System weidmueller uc20-wl2000-ac_firmware < 1.10.3 Yes
Operating System weidmueller uc20-wl2000-ac_firmware 1.11.0 Yes
Operating System weidmueller uc20-wl2000-ac_firmware 1.12.1 Yes
Hardware weidmueller uc20-wl2000-ac - No
Operating System weidmueller uc20-wl2000-iot_firmware < 1.9.1 Yes
Operating System weidmueller uc20-wl2000-iot_firmware < 1.10.3 Yes
Operating System weidmueller uc20-wl2000-iot_firmware 1.11.0 Yes
Operating System weidmueller uc20-wl2000-iot_firmware 1.12.1 Yes
Hardware weidmueller uc20-wl2000-iot - No
Operating System weidmueller iot-gw30_firmware < 1.9.1 Yes
Operating System weidmueller iot-gw30_firmware < 1.10.3 Yes
Operating System weidmueller iot-gw30_firmware 1.11.0 Yes
Operating System weidmueller iot-gw30_firmware 1.12.1 Yes
Hardware weidmueller iot-gw30 - No
Operating System weidmueller iot-gw30-4g-eu_firmware < 1.9.1 Yes
Operating System weidmueller iot-gw30-4g-eu_firmware < 1.10.3 Yes
Operating System weidmueller iot-gw30-4g-eu_firmware 1.11.0 Yes
Operating System weidmueller iot-gw30-4g-eu_firmware 1.12.1 Yes
Hardware weidmueller iot-gw30-4g-eu - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For weidmueller's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.