Executive brief
A security vulnerability has been identified in the D-Link DI-8003 router that could allow an attacker to crash the device. By sending a specially crafted web request, an attacker can cause the system to become unresponsive, leading to a total loss of internet connectivity and network services. Because this product has reached its end-of-life status, the manufacturer will not be releasing a fix, and it is recommended that the hardware be replaced.
Technical details
A classic buffer overflow (CWE-120) exists in the D-Link DI-8003 router, specifically within the firmware version 16.07.26A1. The vulnerability is located in the '/web_post.asp' endpoint due to improper length validation of multiple parameters, including 'name', 'en', 'user_id', 'log', and 'time'. An unauthenticated attacker can trigger this overflow by sending a crafted HTTP GET request containing excessively long strings in these parameters. Successful exploitation leads to a denial-of-service (DoS) condition. As the DI-8003 is an End-of-Life (EoL) product, D-Link has stated that no firmware updates will be provided to address this issue.
Affected products
- D-Link DI-8003 16.07.26A1
Timeline
- 2026-04-08: disclosed: Initial disclosure of the vulnerability.
- 2026-04-15: advisory: D-Link published a security announcement confirming the EoL status and lack of patches.