Vulnerability Details CVE-2026-35717
A stack-based buffer overflow in the export_language.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a allows authenticated remote attackers to execute arbitrary code as root via a crafted POST request to the /cgi-bin/admin/export_language.cgi endpoint. The handler passes the attacker-controlled Content-Length value directly to fread() as the read size into a fixed-size 0x60-byte stack buffer, overwriting the saved link register. The binary is compiled without stack canaries.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 16.8%
CVSS Severity
CVSS v3 Score 6.3
References
Products affected by CVE-2026-35717
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cpe:2.3:h:vivotek:fd8136:-
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cpe:2.3:o:vivotek:fd8136_firmware:0300a