CVE-2026-71958 [CRITICAL] – D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2_C1_20260211004

D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2_C1_202602110044 contain a buffer overflow vulnerability in the quicksetup.cgi interface. A remote attacker can write overly long strings to the test4, ssid2, and username fields and execute arbitrary commands by crafting a specific payload, or cause the device to crash.