CVE-2021-45382
D-Link Multiple Routers Remote Code Execution Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 4 Apr 2022
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.
Key facts
- Published
- 17 Feb 2022
- Last changed
- 21 Oct 2025
- Assigned by
- mitre
- KEV added
- 4 Apr 2022
- KEV fix due
- 25 Apr 2022
- EPSS
- 97.836% likely to be exploited in the next 30 days, higher than 99.908% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- The impacted product is end-of-life and should be disconnected if still in use.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 17 Feb 2022 Published
- 4 Apr 2022 CVE-2021-45382 added to CISA KEV
- 4 Apr 2022 Added to the CISA KEV catalogue
Weakness
Practice this bug class
HackZoneLabs has a hands-on lab on OS command injection (CWE-78).