CVE-2021-45382: D-Link Multiple Routers Remote Code Execution Vulnerability

Vulnerability summary

CVE-2021-45382 is a high (CVSS 10.0) OS Command Injection vulnerability in D-Link Multiple Routers. It is known to be exploited: CISA lists it, first on 04-04-2022. EPSS estimates a 97.84% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 17-02-2022
   PublishedVulnerability first disclosed.
2. 04-04-2022
   Added to CISA KEVD-Link Multiple Routers Remote Code Execution Vulnerability
3. 25-04-2022
   CISA remediation dueThe impacted product is end-of-life and should be disconnected if still in use.
4. 21-10-2025
   Last modifiedVulnerability information updated.

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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.