D-Link · Multiple Routers
CVE-2019-16920
D-Link Multiple Routers Command Injection Vulnerability
What it is
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.
CISA: Multiple D-Link routers contain a command injection vulnerability which can allow attackers to achieve full system compromise.
What to do
The impacted product is end-of-life and should be disconnected if still in use.
Deadline for US federal agencies: April 15, 2022
More exploited flaws from D-Link
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Sep 8, 2022 | OS Command Injection | Multiple Routers | Critical 9.8 | 97% |
| Apr 4, 2022 | Remote Code Execution | Multiple Routers | Critical 9.8 | 98% |
| Apr 24, 2026 | Command Injection | DIR-823X | High 7.2 | 88% |
| Dec 8, 2025 | Buffer Overflow | Routers | Critical 9.8 | 56% |
| Aug 5, 2025 | Unspecified | DCS-2530L and DCS-2670L Devices | High 7.5 | 98% |
| Aug 5, 2025 | DCS-2530L and DCS-2670L Command Injection | DCS-2530L and DCS-2670L Devices | High 8.8 | 54% |
| Aug 5, 2025 | Download of Code Without Integrity Check | DNR-322L | High 8.8 | 34% |
| Jun 25, 2025 | D-Link DIR-859 Router Path Traversal | DIR-859 Router | Medium 5.3 | 83% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.