# CVE-2026-107359: Silicon Labs WF200 denial of service in beacon handler

Source: https://junglewise.ai/threats/cve-2026-107359-improper-input-validation-in-the-beacon-handler-for-wf200  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-05. Updated: 2026-11-05  
License: CC BY 4.0 with a link back

CVE-2026-107359 · Severity: info · Published 2026-11-05

The WF200 is a Wi-Fi module used in embedded IoT devices to provide wireless connectivity. A malformed Wi-Fi beacon frame can crash the firmware, causing the device to stop functioning until manually reset, effectively creating a denial-of-service condition. An attacker within Wi-Fi range can transmit a specially crafted beacon to trigger this fault.

Vendors: [Silicon Labs](https://junglewise.ai/threats/vendors/silicon-labs).

## Quick answers

**Is CVE-2026-107359 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-107359 being exploited in the wild.

**How severe is CVE-2026-107359?** Informational severity, published 5 November 2026.

**Which products and versions are affected?** Silicon Labs WF200 3.17.0 and earlier.

**Is there a fix for CVE-2026-107359?** Yes: fixed in WF200 3.18.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-107359 attacked?** It is attacked from the adjacent network, in device firmware.

**Am I affected by CVE-2026-107359?** Check whether you run Silicon Labs WF200 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.

## How to fix

- Fixed in WF200 3.18.0 or later

## Technical details

The vulnerability is an improper input validation flaw in the Wi-Fi beacon frame handler that triggers a divide-by-zero fault in WF200 firmware versions 3.17.0 and earlier. Attack requires only Wi-Fi proximity (adjacent network vector) with no authentication or user interaction. Exploitation results in a fault and denial of service until device reset; a firmware update to 3.18.0 or later fixes the issue.

## Affected products

- Silicon Labs WF200 3.17.0 and earlier

## Timeline

- 2026-11-05: disclosed

## References

- [https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000593.md](https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000593.md)