CVE-2019-16920: D-Link Multiple Routers Command Injection Vulnerability

Vulnerability summary

CVE-2019-16920 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 25-03-2022. EPSS estimates a 100.00% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 27-09-2019
   PublishedVulnerability first disclosed.
2. 25-03-2022
   Added to CISA KEVD-Link Multiple Routers Command Injection Vulnerability
3. 15-04-2022
   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

Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The issue occurs when the attacker sends an arbitrary input to a "PingTest" device common gateway interface that could lead to common injection. An attacker who successfully triggers the command injection could achieve full system compromise. Later, it was independently found that these are also affected: DIR-855L, DAP-1533, DIR-862L, DIR-615, DIR-835, and DIR-825.

• 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.