Vulnerability Monitor

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CVE-2021-33539

In Weidmueller Industrial WLAN devices in multiple versions an exploitable authentication bypass vulnerability exists in the hostname processing. A specially configured device hostname can cause the device to interpret selected remote traffic as local traffic, resulting in a bypass of web authentication. An attacker can send authenticated SNMP requests to trigger this vulnerability.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.2, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 16 products from weidmueller, from weidmueller, from weidmueller and 13 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

2021-06-25T19:15:09.633

Last Modified

2024-11-21T06:09:02.570

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.2 (HIGH)

CVSSv2 Vector

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

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

8.0

Impact Score

6.4

Weaknesses
  • Type: Secondary
    CWE-287
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System weidmueller ie-wl-bl-ap-cl-eu_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wl-bl-ap-cl-eu - No
Operating System weidmueller ie-wlt-bl-ap-cl-eu_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wlt-bl-ap-cl-eu - No
Operating System weidmueller ie-wl-bl-ap-cl-us_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wl-bl-ap-cl-us - No
Operating System weidmueller ie-wlt-bl-ap-cl-us_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wlt-bl-ap-cl-us - No
Operating System weidmueller ie-wl-vl-ap-br-cl-eu_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wl-vl-ap-br-cl-eu - No
Operating System weidmueller ie-wlt-vl-ap-br-cl-eu_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wlt-vl-ap-br-cl-eu - No
Operating System weidmueller ie-wl-vl-ap-br-cl-us_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wl-vl-ap-br-cl-us - No
Operating System weidmueller ie-wlt-vl-ap-br-cl-us_firmware ≤ 1.16.18 Yes
Hardware weidmueller ie-wlt-vl-ap-br-cl-us - No
Operating System weidmueller ie-wl-bl-ap-cl-eu_firmware ≤ 1.11.10 Yes
Hardware weidmueller ie-wl-bl-ap-cl-eu - No
Operating System weidmueller ie-wlt-bl-ap-cl-eu_firmware ≤ v1.11.10 Yes
Hardware weidmueller ie-wlt-bl-ap-cl-eu - No
Operating System weidmueller ie-wl-bl-ap-cl-us_firmware ≤ 1.11.10 Yes
Hardware weidmueller ie-wl-bl-ap-cl-us - No
Operating System weidmueller ie-wlt-bl-ap-cl-us_firmware ≤ 1.11.10 Yes
Hardware weidmueller ie-wlt-bl-ap-cl-us - No
Operating System weidmueller ie-wl-vl-ap-br-cl-eu_firmware ≤ 1.11.10 Yes
Hardware weidmueller ie-wl-vl-ap-br-cl-eu - No
Operating System weidmueller ie-wlt-vl-ap-br-cl-eu_firmware ≤ 1.11.10 Yes
Hardware weidmueller ie-wlt-vl-ap-br-cl-eu - No
Operating System weidmueller ie-wl-vl-ap-br-cl-us_firmware ≤ 1.11.10 Yes
Hardware weidmueller ie-wl-vl-ap-br-cl-us - No
Operating System weidmueller ie-wlt-vl-ap-br-cl-us_firmware ≤ 1.11.10 Yes
Hardware weidmueller ie-wlt-vl-ap-br-cl-us - 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.