# CVE-2026-30650: Vivotek FD8136 buffer overflow in eventtask.cgi

Source: https://junglewise.ai/threats/cve-2026-30650-vivotek-fd8136-buffer-overflow-in-eventtask-cgi  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-02. Updated: 2026-06-02  
License: CC BY 4.0 with a link back

CVE-2026-30650 · Severity: info · CVSS 8.8 · Published 2026-06-02

A security vulnerability exists in Vivotek FD8136 network cameras, which are used for professional video surveillance. An attacker with valid login credentials can exploit this flaw to take full control of the camera. This could allow them to disable security monitoring, access private video feeds, or use the device as a foothold to attack other parts of the corporate network.

Technologies: [VIVOTEK FD8136](https://junglewise.ai/threats/technologies/fd8136). Vendors: [VIVOTEK](https://junglewise.ai/threats/vendors/vivotek).

## Quick answers

**Is CVE-2026-30650 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-30650 being exploited in the wild.

**How severe is CVE-2026-30650?** Informational severity, with a CVSS score of 8.8, published 2 June 2026.

**Which products and versions are affected?** VIVOTEK FD8136 FD8136-VVTK-0300a.

**Is there a fix for CVE-2026-30650?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-30650 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-30650?** Check whether you run VIVOTEK FD8136 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow exists in the /cgi-bin/admin/eventtask.cgi endpoint of Vivotek FD8136 cameras running firmware FD8136-VVTK-0300a. The vulnerability occurs because the binary reads the raw POST request body from stdin into a fixed-size stack buffer (approximately 0x88 bytes) without performing bounds checking. An authenticated attacker can exploit this by sending a specially crafted POST request with a body exceeding the buffer size, allowing them to overwrite the saved link register and redirect control flow. The device lacks modern memory protections such as stack canaries, facilitating straightforward remote code execution with root privileges.

## Affected products

- Vivotek FD8136 FD8136-VVTK-0300a

## Timeline

- 2026-05: disclosed: Discovered by Lewis Patten
- 2026-06-02: advisory: CVE published to NVD

## References

- [http://vivotek.com/](http://vivotek.com/)
- [https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-30650](https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-30650)

## Related threats

- [Vivotek FD8136 buffer overflow in setdo.cgi](https://junglewise.ai/threats/cve-2026-30652-vivotek-fd8136-buffer-overflow-in-setdo-cgi)
- [VIVOTEK FD8136 stack buffer overflow in set_getparam.cgi](https://junglewise.ai/threats/cve-2026-30649-vivotek-fd8136-stack-buffer-overflow-in-set-getparam-cgi)