CVE-2026-35716: A stack-based buffer overflow in the motion_privacy.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a al

Routine

MEDIUM 6.3MITIGATE

CVE-2026-35716 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 motion_privacy.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a allows authenticated remote attackers to execute arbitrary code as root via an oversized n1 parameter in a POST request to the /cgi-bin/admin/setpm.cgi, /cgi-bin/admin/setmd.cgi, or /cgi-bin/admin/setmd_profile.cgi endpoint (all symlinks to the same binary). The parameter value is copied into a fixed-size 0xa4-byte stack buffer without boun

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 75%)
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 16:16 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-2026-35716?

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

Is CVE-2026-35716 being exploited?

CVE-2026-35716 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-2026-35716 affect?

CVE-2026-35716 affects fd8136 firmware. Severity is medium (CVSS 6.3). A stack-based buffer overflow in the motion_privacy.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a allows authenticated remote attackers to execute arbitrary code as root via an oversized n1 parameter in a POST request to the /cgi-

How urgent is CVE-2026-35716?

Priority 28/100. No elevated risk signals yet.

Related CVEs

CVE-2026-30650 HIGH 8.8 MITIGATE A post-authentication remote buffer overflow vulnerability exists in the /cgi-bin/admin/eventtask.cgi endpoint
CVE-2026-30652 HIGH 8.8 MITIGATE A remote buffer overflow vulnerability exists in the /cgi-bin/dido/setdo.cgi endpoint of the admin interface o
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-2026-35717 MEDIUM 6.3 MITIGATE A stack-based buffer overflow in the export_language.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a a

References

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