# CVE-2025-70520: Fanvil x7a websocket authentication bypass

Source: https://junglewise.ai/threats/cve-2025-70520-the-websocket-handler-of-fanvil-x7a-firmware-version-2-6-0-1182  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-07. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2025-70520 · Severity: critical · CVSS 9.8 · Published 2026-10-07

Fanvil x7a is an Android-based business phone with a web management portal. The device's websocket handler fails to verify user authentication, allowing unauthenticated attackers to access sensitive operational logs and perform diagnostic functions. This can lead to information disclosure and system compromise without any credentials or user interaction.

Technologies: [Fanvil X7a](https://junglewise.ai/threats/technologies/x7a). Vendors: [Fanvil](https://junglewise.ai/threats/vendors/fanvil).

## Quick answers

**Is CVE-2025-70520 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-70520 being exploited in the wild.

**How severe is CVE-2025-70520?** Critical severity, with a CVSS score of 9.8, published 7 October 2026.

**Which products and versions are affected?** Fanvil X7a 2.6.0.1182.

**Is there a fix for CVE-2025-70520?** 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-2025-70520 attacked?** It is attacked over the network.

**Am I affected by CVE-2025-70520?** Check whether you run Fanvil X7a 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

The websocket handler in the management portal does not enforce authentication checks for sessionless users, allowing remote attackers to send crafted websocket requests to access protected resources such as operational logs and diagnostic tools. An unauthenticated attacker can connect directly to the websocket endpoint (e.g., /log or /Ping) and retrieve sensitive information or execute diagnostic commands. The vulnerability affects firmware version 2.6.0.1182 and requires only network access to the device.

## Affected products

- Fanvil x7a 2.6.0.1182

## Timeline

- 2026-02-27: disclosed: DarkPoint vulnerability disclosure published
- 2026-10-07: advisory: NVD entry published

## References

- [http://download.fanvil.com/Firmware/Release/PA2S/](http://download.fanvil.com/Firmware/Release/PA2S/)
- [https://www.darkpoint.ca/blog/2026/02/27/Fanvil-x7a-PA2S-Vulnerability-Disclosure](https://www.darkpoint.ca/blog/2026/02/27/Fanvil-x7a-PA2S-Vulnerability-Disclosure)

## Related threats

- [Fanvil x7a cross-site request forgery in request handler](https://junglewise.ai/threats/cve-2025-70522-the-request-handler-of-fanvil-x7a-firmware-version-2-6-0-1182)
- [Fanvil x7a command injection in diagnostic ping tool](https://junglewise.ai/threats/cve-2025-70521-the-management-portal-s-diagnostic-ping-tool-of-fanvil-x7a)
- [Fanvil x7a cross-site scripting in device log](https://junglewise.ai/threats/cve-2025-70519-the-device-log-component-of-fanvil-x7a-firmware-version-2-6-0)
- [Fanvil x7a command injection in diagnostic ping tool](https://junglewise.ai/threats/cve-2025-70518-the-management-portal-s-diagnostic-ping-tool-of-fanvil-x7a)
- [Fanvil x7a firmware CSRF vulnerability in request handler](https://junglewise.ai/threats/cve-2025-70517-the-request-handler-of-fanvil-x7a-firmware-version-2-6-0-1182)