A buffer overflow vulnerability (CVE-2026-0836) has been identified in UTT 进取 520W version 1.7.7-180627. The vulnerability exists in the strcpy function within the /goform/formConfigFastDirectionW file, where manipulation of the ssid argument causes a buffer overflow. The vulnerability can be exploited remotely and exploit code has been publicly disclosed. The vendor was contacted about this disclosure but did not respond. This represents a significant security risk for affected UTT router devices.