CVE-2026-35716

MEDIUM

VIVOTEK FD8136 FD8136-VVTK-0300a - Authenticated Remote Code Execution via Oversized n1 Parameter

Title source: llm

Description

A stack-based buffer overflow in the motion_privacy.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a allows authenticated remote attackers to execute arbitrary code as root via an oversized n1 parameter in a POST request to the /cgi-bin/admin/setpm.cgi, /cgi-bin/admin/setmd.cgi, or /cgi-bin/admin/setmd_profile.cgi endpoint (all symlinks to the same binary). The parameter value is copied into a fixed-size 0xa4-byte stack buffer without bounds checking, overwriting the saved link register. The binary is compiled without stack canaries.

References (2)

Core 2

Core References

http://vivotek.com

https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-35716

View Writeup ZIP pw:eip

Scores

CVSS v3 6.3

EPSS 0.0037

EPSS Percentile 28.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-121

Status published

Products (1)

vivotek/fd8136_firmware 0300a

Published Jun 02, 2026

Tracked Since Jun 02, 2026