CVE-2026-35717 — MEDIUM (6.3)

Vulnerability Description

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.

CVSS Score

6.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Vivotek	Fd8136 Firmware	0300a
Vivotek	Fd8136	-

Related Weaknesses (CWE)

CWE-121

References

https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-35717Third Party Advisory

FAQ

What is CVE-2026-35717?

CVE-2026-35717 is a vulnerability with a CVSS score of 6.3 (MEDIUM). 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 ...

How severe is CVE-2026-35717?

CVE-2026-35717 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-35717?

Check the references section above for vendor advisories and patch information. Affected products include: Vivotek Fd8136 Firmware, Vivotek Fd8136.