CVE-2026-35717 Details
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.
A stack-based buffer overflow vulnerability has been identified in the export_language.cgi binary of the VIVOTEK FD8136 firmware version FD8136-VVTK-0300a. This vulnerability allows authenticated remote attackers to execute arbitrary code as root. The issue arises because the handler passes an attacker-controlled Content-Length value directly to fread() as the read size, into a fixed-size stack buffer of 0x60 bytes. This oversight enables the overwriting of the saved link register. The vulnerability can be exploited by sending a crafted POST request to the /cgi-bin/admin/export_language.cgi endpoint. Notably, the binary is compiled without stack canaries, leaving it susceptible to such attacks.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-35717 | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| vivotek fd8136 firmware | 0300a |
CPE
Remediation
| |
| vivotek fd8136 | All versions |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | CVE Translated | [email protected] |
| Jul 5, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 3, 2026 | Initial Analysis | [email protected] |
| Jun 3, 2026 | CVE Modified | CISA-ADP |
| Jun 2, 2026 | New CVE Received | [email protected] |