Buffer overflow in Vivotek Fd8136
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002
Affected products
- Vivotek Fd8136
- Vivotek Fd8136 Firmware — versions 0300a
Weakness classification (CWE)
References
- vivotek.com (Product)
- github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-35717 (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-35717?
- CVE-2026-35717 is a medium-severity vulnerability in Vivotek Fd8136, classified under Stack-based Buffer Overflow. CVSS score: 6.3/10. Published 2026-06-02.
- How severe is CVE-2026-35717?
- Medium severity. CVSS v3 base score is 6.3 out of 10.