Is CVE-2021-45382 in the CISA KEV catalog?

Yes. CVE-2021-45382 is on the CISA Known Exploited Vulnerabilities list, added 2022-04-04.

What is the CVSS severity of CVE-2021-45382?

CVE-2021-45382 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-45382?

CVE-2021-45382 has an EPSS score of 97.84% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2021-45382?

CVE-2021-45382 affects an end-of-life product with no vendor fix. CISA advises disconnecting affected systems.

CVE & CISA-KEV Catalog

CVE-2021-45382

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.

CWE-78OS Command Injection

How to fix

No fix available - end of life

This product no longer receives security updates. CISA advises disconnecting affected systems if still in use.

CISA required action: The impacted product is end-of-life and should be disconnected if still in use.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

97.84%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

D-Link Multiple Routers Remote Code Execution Vulnerability

A remote code execution vulnerability exists in all series H/W revisions routers via the DDNS function in ncc2 binary file.

The impacted product is end-of-life and should be disconnected if still in use.

Remediation due: 2022-04-25

References

Exploit1

github.com

Vendor Advisory1

supportannouncement.us.dlink.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	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 2025-11-10.