Totolink - Nr1800x - CRITICAL - CVE-2026-82616. A critical vulnerability has been identified in the TOTOLINK NR1800X router, specifically affecting the function setUploadSetting located in the file /cgi-bin/cstecgi.cgi. An exploitable stack-based buffer overflow occurs due to improper handling of the FileName argument, enabling an attacker to gain unauthorized access remotely. The vulnerability has been publicly disclosed, making systems running the affected firmware version susceptible to attacks that could lead to potential data breaches and system compromise. BADGES: 👾 EXPLOITED | 🟡 PoC | SecurityVulnerability.io