Medium severity · published Jun 2, 2026
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…
6.3
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FF
Fd8136 Firmware · Vivotek
0300a · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35717
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35717
Third Party Advisory
https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-35717
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