CVE-2026-35717: n/a
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.
AI Analysis
Technical Summary
This vulnerability is a stack-based buffer overflow in the export_language.cgi binary of VIVOTEK FD8136 firmware (FD8136-VVTK-0300a). An authenticated attacker can send a specially crafted POST request to the /cgi-bin/admin/export_language.cgi endpoint with a manipulated Content-Length header. The handler uses this Content-Length value directly in fread() to read data into a fixed-size 96-byte stack buffer, leading to overflow and overwriting the saved link register. The binary is compiled without stack canaries, which normally help prevent such attacks. This allows arbitrary code execution with root privileges.
Potential Impact
Successful exploitation allows an authenticated remote attacker to execute arbitrary code with root privileges on the affected device. This can lead to full system compromise, including unauthorized control and potential disruption of device functionality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated access to the affected endpoint and monitor for suspicious activity related to POST requests to /cgi-bin/admin/export_language.cgi. Avoid exposing the device management interface to untrusted networks.
CVE-2026-35717: n/a
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.
CVSS v3.1
Score 6.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a stack-based buffer overflow in the export_language.cgi binary of VIVOTEK FD8136 firmware (FD8136-VVTK-0300a). An authenticated attacker can send a specially crafted POST request to the /cgi-bin/admin/export_language.cgi endpoint with a manipulated Content-Length header. The handler uses this Content-Length value directly in fread() to read data into a fixed-size 96-byte stack buffer, leading to overflow and overwriting the saved link register. The binary is compiled without stack canaries, which normally help prevent such attacks. This allows arbitrary code execution with root privileges.
Potential Impact
Successful exploitation allows an authenticated remote attacker to execute arbitrary code with root privileges on the affected device. This can lead to full system compromise, including unauthorized control and potential disruption of device functionality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated access to the affected endpoint and monitor for suspicious activity related to POST requests to /cgi-bin/admin/export_language.cgi. Avoid exposing the device management interface to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-04-06T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1ee648e29bf47b50d3a754
Added to database: 06/02/2026, 14:18:48 UTC
Last enriched: 07/05/2026, 21:46:04 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 40
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.