CVE-2026-2616 in 777VR1
Summary
by MITRE • 02/17/2026
A vulnerability has been found in Beetel 777VR1 up to 01.00.09. The impacted element is an unknown function of the component Web Management Interface. The manipulation leads to hard-coded credentials. The attack needs to be initiated within the local network. The exploit has been disclosed to the public and may be used. It is advisable to modify the configuration settings. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/21/2026
The vulnerability identified as CVE-2026-2616 represents a critical security flaw in the Beetel 777VR1 router model, specifically affecting firmware versions up to 01.00.09. This issue resides within the Web Management Interface component, which serves as the primary administrative portal for configuring and managing the device's network settings. The affected function appears to contain hard-coded credentials that remain unchanged across all installations, creating a persistent security risk that undermines the device's authentication mechanisms. The vulnerability's classification aligns with CWE-798, which specifically addresses the use of hard-coded credentials in software systems, making it particularly dangerous as it provides unauthorized access to the device's administrative functions without requiring knowledge of legitimate user credentials.
The technical exploitation of this vulnerability requires an attacker to be within the local network of the affected device, which significantly reduces the attack surface but does not eliminate the risk entirely. The local network access requirement means that an attacker must already have physical or network access to the premises where the device is deployed, potentially through methods such as wireless network access, network compromise, or direct physical access. Once inside the network, the attacker can leverage the hard-coded credentials to gain full administrative control over the router, enabling them to modify network configurations, implement man-in-the-middle attacks, redirect traffic, or establish persistent backdoors. This level of access allows for complete network compromise and can serve as a launching point for further attacks against other connected devices.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it fundamentally compromises the security posture of any network that relies on the affected router. Network administrators lose control over their network infrastructure, potentially enabling attackers to modify DNS settings, redirect traffic to malicious sites, or disable security features. The disclosure of this exploit to the public creates an immediate risk for all affected devices, as attackers can now easily implement this technique without requiring advanced technical skills or specialized tools. The lack of vendor response to early disclosure attempts compounds the issue, leaving users without official patches or mitigation guidance during a critical period when the vulnerability is actively being exploited in the wild.
Security professionals should immediately implement several mitigation strategies to address this vulnerability. The most effective immediate action involves changing the default administrative credentials through the web interface, although this may be impossible if the hard-coded credentials are used in the login process. Network segmentation should be implemented to isolate the affected devices from critical network segments, while firewall rules should be configured to restrict access to the router's management interface. The ATT&CK framework categorizes this vulnerability under T1078 Valid Accounts, as it leverages legitimate administrative credentials to gain access to network resources, and T1046 Network Service Scanning, as attackers may need to identify the device's management interface. Organizations should also consider implementing network monitoring to detect unusual traffic patterns that might indicate exploitation attempts. The absence of vendor support for this vulnerability underscores the importance of maintaining up-to-date firmware and implementing robust network security practices to protect against unpatched vulnerabilities in network infrastructure devices.