CVE-2026-2702: Beetel 777VR1 Auth Bypass Vulnerability

CVE-2026-2702 Overview

A security flaw has been discovered in the Beetel 777VR1 router firmware up to version 01.00.09. This vulnerability affects the WPA2 PSK component and involves hard-coded credentials that could allow an attacker with local network access to gain unauthorized access to the device. The vendor was contacted early about this disclosure but did not respond in any way, and the exploit has been released to the public.

Critical Impact

Hard-coded credentials in the WPA2 PSK component could allow adjacent network attackers to gain unauthorized access to the router, though exploitation is assessed as difficult due to high attack complexity.

Affected Products

• Beetel 777VR1 firmware up to 01.00.09

Discovery Timeline

• February 19, 2026 - CVE-2026-2702 published to NVD
• February 19, 2026 - Last updated in NVD database

Technical Details for CVE-2026-2702

Vulnerability Analysis

This vulnerability is classified under CWE-259 (Use of Hard-coded Password), a common security weakness where authentication credentials are embedded directly in the firmware or application code. In this case, the Beetel 777VR1 router contains hard-coded credentials within its WPA2 PSK component, which handles wireless network authentication.

The hard-coded credentials issue means that all devices running the affected firmware versions share the same embedded credentials, making it impossible for administrators to fully secure these devices through normal password changes. An attacker who discovers these credentials could potentially authenticate to the device or access protected functionality.

Root Cause

The root cause of this vulnerability is the embedding of static credentials directly within the WPA2 PSK processing component of the router's firmware. This represents a fundamental design flaw where credentials that should be uniquely configurable by device owners are instead fixed at the firmware level. Such hard-coded credentials are often introduced during development for debugging or testing purposes and inadvertently left in production firmware.

Attack Vector

Exploitation of this vulnerability requires the attacker to have access to the adjacent network (local network access). The attack vector involves:

1. Gaining physical proximity or network access to the target Beetel 777VR1 router
2. Identifying the hard-coded credentials embedded in the WPA2 PSK component
3. Using these credentials to authenticate or access protected functionality on the device

The attack complexity is assessed as high, meaning successful exploitation is difficult and may require additional conditions to be met. The proof of concept has been publicly released, providing details on the vulnerability mechanism and steps to reproduce. Technical details can be found in the GitHub Gist PoC and the reproduction steps.

Detection Methods for CVE-2026-2702

Indicators of Compromise

• Unexpected successful authentications to the router's administrative interface from unknown devices
• Unusual configuration changes on the router that were not made by authorized administrators
• Wireless network access by unrecognized devices using valid credentials

Detection Strategies

• Monitor authentication logs on the Beetel 777VR1 router for anomalous access patterns
• Implement network traffic analysis to detect unauthorized devices connecting to the wireless network
• Conduct periodic firmware version audits to identify devices running vulnerable firmware versions (01.00.09 and earlier)

Monitoring Recommendations

• Enable logging on the router if available and forward logs to a centralized SIEM solution
• Deploy network access control (NAC) solutions to identify and alert on unauthorized device connections
• Perform regular wireless network scans to detect rogue devices that may have connected using compromised credentials

How to Mitigate CVE-2026-2702

Immediate Actions Required

• Isolate affected Beetel 777VR1 devices on a separate network segment to limit potential exposure
• Implement additional network-level access controls such as MAC filtering and VLAN segmentation
• Monitor the vendor's website for firmware updates that address this vulnerability
• Consider replacing affected devices with alternatives that do not have hard-coded credential issues

Patch Information

At the time of publication, no patch is available from the vendor. According to the vulnerability disclosure, the vendor was contacted early about this issue but did not respond. Organizations should monitor VulDB entry #346648 for updates on any vendor response or patch availability.

Workarounds

• Implement network segmentation to isolate the router from critical network assets
• Use additional authentication layers such as a VPN for accessing the network
• Deploy intrusion detection systems (IDS) to monitor for suspicious activity targeting the device
• Consider replacing the affected device with a router from a vendor with a more responsive security posture