How severe is CVE-2026-35717?

CVE-2026-35717 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-35717 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35717?

CVE-2026-35717 affects Vivotek Fd8136 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35717?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-35717 have an EU (EUVD) identifier?

Yes. CVE-2026-35717 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33934.

When was CVE-2026-35717 published?

CVE-2026-35717 was published on 2026-06-02 and last updated on 2026-07-05.

CVE-2026-35717

CVE-2026-35717 is a medium-severity vulnerability in Vivotek Fd8136 Firmware with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33934
Weakness: CWE-121
Affected product: Vivotek Fd8136 Firmware
Published: 2026-06-02
Last modified: 2026-07-05

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-35717?: CVE-2026-35717 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-35717 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35717?: CVE-2026-35717 affects Vivotek Fd8136 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35717?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35717 have an EU (EUVD) identifier?: Yes. CVE-2026-35717 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33934.
When was CVE-2026-35717 published?: CVE-2026-35717 was published on 2026-06-02 and last updated on 2026-07-05.

References

https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-35717

EU advisories (EUVD)

http://vivotek.com

Affected products (1)

cpe:2.3:o:vivotek:fd8136_firmware:0300a:*:*:*:*:*:*:*

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