CVE-2021-20999 - CVE House

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Status published Critical CVE-2021-20999

WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways

9.4 CVSS

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Reported by Weidmüller.

References

https://cert.vde.com/en-us/advisories/vde-2021-016

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Affected Vendor

Weidmüller

View all reports →

Affected Software

UC20-WL2000-AC (No. 1334950000), UC20-WL2000-IOT (No. 1334990000), IOT-GW30 (No. 2682620000), IOT-GW30-4G-EU (No. 2682630000)

Vulnerable Versions:

1.3.0, 1.10.0, 1.11.0

Timeline

Official Publish: May 13th, 2021

Last Modified: September 17th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1213 Data from Information Repositories

T1005 Data from Local System

T1078 Valid Accounts