CVE-2021-20999 — WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways

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.

Published May 13, 2021Updated Sep 17, 2024Sources: cvelistV5, CERTVDE

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Unreported

no source claims exploitation

EPSS

chance of exploitation in 30 days

Affects

weidm ller

4 products listed

CVSS base

9.4

CRITICAL

Affected scope

The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.

Vendors (1)

weidm ller

Products (4)

uc20 wl2000 ac no 1334950000uc20 wl2000 iot no 1334990000iot gw30 no 2682620000iot gw30 4g eu no 2682630000

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
9.4	CVSS 3.1	CRITICAL	—	—	cvelistV5

Weakness & attack patterns

CWE-668

References

1 on the record

cert.vde.com/en-us/advisories/vde-2021-016
x_refsource_CONFIRM

Elsewhere on this site

weidm llerevery CVE for this vendor
CWE-668other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.