Is CVE-2021-20999 in the CISA KEV catalog?

No. CVE-2021-20999 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20999?

CVE-2021-20999 has a CVSS v3 base score of 9.4 (CRITICAL).

What is the EPSS score for CVE-2021-20999?

CVE-2021-20999 has an EPSS score of 0.95% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20999?

Upgrade iot-gw30-4g-eu firmware to 1.10.3 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-20999

CRITICAL

9.4

CVSS v3

NVD

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.

CWE-668

How to fix

Remediation Available

iot-gw30-4g-eu firmwareNVD

Affected:>= 1.10.0, < 1.10.3Fixed in:1.10.3CVE-2021-20999derived from NVD

iot-gw30 firmwareNVD

Affected:>= 1.10.0, < 1.10.3Fixed in:1.10.3CVE-2021-20999derived from NVD

uc20-wl2000-ac firmwareNVD

Affected:>= 1.10.0, < 1.10.3Fixed in:1.10.3CVE-2021-20999derived from NVD

uc20-wl2000-iot firmwareNVD

Affected:>= 1.10.0, < 1.10.3Fixed in:1.10.3CVE-2021-20999derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.95%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Third-Party Advisory1

cert.vde.com

Related Vulnerabilities

Other CWE-668 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2017-16597	Critical	9.8	57%	-	-
CVE-2017-16603	High	8.8	54%	-	-
CVE-2024-25153	Critical	9.8	42%	-	Fix
CVE-2017-0215	Medium	5.3	36%	-	-
CVE-2022-25236	Critical	9.8	34%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.