CVE-2026-35716 — MEDIUM (6.3)

Vulnerability 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.

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-2026-35716Third Party Advisory

FAQ

What is CVE-2026-35716?

CVE-2026-35716 is a vulnerability with a CVSS score of 6.3 (MEDIUM). 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 ...

How severe is CVE-2026-35716?

CVE-2026-35716 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-2026-35716?

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