CVE-2026-35716

State: Published
Severity: 6.3 Medium
Published: Jun 2, 2026
Updated: Jul 5, 2026
Reserved: Apr 6, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	CISA-ADP

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
n/an/a	n/aAffected

References

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

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