CVE-2026-35717: A stack-based buffer overflow in the export_language.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a a

Routine

MEDIUM 6.3MITIGATE

CVE-2026-35717 is a medium-severity flaw (CVSS 6.3) affecting fd8136 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-06-02
Last modified	2026-07-22

Publisher (CNA): MITRE · Vendor: vivotek

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 14:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

vivotek fd8136 firmware MITIGATE

Affected: 0300a

Fixed in: no fixed release known

Safe to downgrade to: a release before 0300a

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-35717?

fd8136 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-35717 being exploited?

CVE-2026-35717 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-35717 affect?

CVE-2026-35717 affects fd8136 firmware. Severity is medium (CVSS 6.3). 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_lan

How urgent is CVE-2026-35717?

Priority 27/100. No elevated risk signals yet.

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CVE-2026-30649 HIGH 7.3 MITIGATE Buffer Overflow vulnerability in VIVOTEK INC FD8136-VVTK-0300a allows a remote attacker to execute arbitrary c
CVE-2026-35718 MEDIUM 6.5 MITIGATE A path traversal vulnerability in the /admin/downloadMedias.cgi endpoint of VIVOTEK INC FD8136-VVTK firmware 0
CVE-2026-35716 MEDIUM 6.3 MITIGATE A stack-based buffer overflow in the motion_privacy.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a al

References

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