Actively exploited in the wild
D-Link Multiple Routers Command Injection Vulnerability
D-Link - Multiple Routers · Listed in the CISA KEV since 2022-03-25. This indicates confirmed attacks in production environments.
Required action: The impacted product is end-of-life and should be disconnected if still in use.
CVE-2019-16920
CriticalCVSS 9.8KEVSummary
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.
Risk Assessment
An attacker can remotely execute arbitrary commands without authentication, leading to full device compromise. This may allow manipulation of network traffic, data theft, or using the device as an entry point into the network.
Recommendation
Update the firmware of affected D-Link devices to the latest version as soon as possible. If no update is available, disable remote access to the administrative interface or replace the device.
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Original NVD description (English source)
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.