# CVE-2025-67446: Neterbit NW-431F authentication bypass via predictable cookie

Source: https://junglewise.ai/threats/cve-2025-67446-neterbit-nw-431f-authentication-bypass-via-predictable-cookie  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-04. Updated: 2026-06-04  
License: CC BY 4.0 with a link back

CVE-2025-67446 · Severity: critical · CVSS 9.8 · Published 2026-06-04

A security vulnerability exists in the Neterbit NW-431F, a 4G LTE desktop router used for providing internet connectivity to homes and offices. The device fails to properly verify user identity, allowing anyone to gain full administrative control by simply changing a piece of data in their web browser. An attacker who takes over the router can monitor network traffic, change security settings, or disrupt internet service for all connected users.

Technologies: [Neterbit NW-431F Router](https://junglewise.ai/threats/technologies/nw-431f-router). Vendors: [Neterbit](https://junglewise.ai/threats/vendors/neterbit).

## Quick answers

**Is CVE-2025-67446 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-67446 being exploited in the wild.

**How severe is CVE-2025-67446?** Critical severity, with a CVSS score of 9.8, published 4 June 2026.

**Which products and versions are affected?** Neterbit NW-431F Router 20241014-IR03 and earlier.

**Is there a fix for CVE-2025-67446?** 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-2025-67446 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-67446?** Check whether you run Neterbit NW-431F Router 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

An improper authentication vulnerability exists in the web management interface of the Neterbit NW-431F router. The application relies on a weak and predictable cookie-based authentication mechanism where the 'username' cookie value is used to determine authorization levels. By manually modifying the HTTP request to include a cookie such as 'username=admin', a remote, unauthenticated attacker can bypass the login schema. This allows for full access to administrative functionalities and configuration pages. As of the advisory date, no patched firmware version has been confirmed.

## Affected products

- Neterbit NW-431F Router 20241014-IR03 and earlier

## Timeline

- 2026-06-04: disclosed: CVE published to the NVD dataset

## References

- [https://github.com/fun-beep/CVEs/tree/main/CVE-2025-67446](https://github.com/fun-beep/CVEs/tree/main/CVE-2025-67446)
- [https://neterbit.com/](https://neterbit.com/)

## Related threats

- [Neterbit NW-431F auth bypass in at_command.asp](https://junglewise.ai/threats/cve-2025-69755-neterbit-nw-431f-auth-bypass-in-at-command-asp)
- [Neterbit NW-431F Router stored XSS in SMS module](https://junglewise.ai/threats/cve-2025-67448-neterbit-nw-431f-router-stored-xss-in-sms-module)
- [Neterbit NW-431F Router OS command injection in ping module](https://junglewise.ai/threats/cve-2025-67447-neterbit-nw-431f-router-os-command-injection-in-ping-module)