CVE-2026-79588 in WIFI4 N300 T1 Pro
Summary
by MITRE • 09/09/2026
U-speed WIFI4 N300 T1 Pro v1.0.0 is vulnerable to Cleartext transmission of administration credentials over HTTP.
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Analysis
by VulDB Data Team • 09/09/2026
The U-speed WIFI4 N300 T1 Pro, specifically version 1.0.0, contains a critical security flaw related to the handling and transmission of administrative credentials within its web-based management interface. This vulnerability stems from the device's failure to enforce secure communication protocols for sensitive authentication data during routine administrative operations. When an administrator accesses the router’s configuration page or attempts to change settings via HTTP rather than HTTPS, the system transmits login information in cleartext format across the network segment. This design oversight exposes the credentials to interception by any entity capable of monitoring local network traffic, effectively bypassing basic confidentiality controls intended to protect administrative access.
From a technical perspective, this issue represents a classic instance of insecure communication channel usage where sensitive data is not encrypted during transit. The absence of Transport Layer Security or equivalent encryption mechanisms means that packets containing usernames and passwords can be captured using standard packet sniffing tools such as Wireshark or tcpdump. Once intercepted, these credentials are immediately usable by an attacker without the need for decryption keys or complex cryptographic attacks. This flaw aligns directly with CWE-319, which classifies cleartext transmission of sensitive information as a significant weakness in software design and implementation. The vulnerability persists because the firmware does not mandate HTTPS connections for administrative tasks nor does it strip HTTP-based authentication attempts that lack proper security headers.
The operational impact of this vulnerability is severe due to the high privilege level associated with router administration access. An attacker who successfully intercepts these credentials gains full control over the network infrastructure managed by the device. This includes the ability to modify DNS settings, redirect traffic through malicious servers, block internet connectivity for legitimate users, or open ports that expose internal services to external threats. Furthermore, compromised administrative accounts can serve as a foothold for lateral movement within an organization’s local area network, potentially leading to broader system compromise and data exfiltration. In the context of the MITRE ATT&CK framework, this vulnerability facilitates techniques such as Credential Access through Network Sniffing (T1040) and subsequent Privilege Escalation or Defense Evasion depending on how the attacker utilizes the stolen credentials to maintain persistence or hide their activities within the network environment.
Mitigation strategies for this issue must focus on enforcing encrypted communications and restricting administrative access vectors. The most effective immediate remedy is to upgrade the device firmware if a patched version is available from U-speed that enforces HTTPS-only administration interfaces. In environments where upgrading is not immediately feasible, administrators should restrict physical or logical access to the management interface by placing it behind an internal firewall rule set that only allows connections from trusted IP addresses. Additionally, implementing network segmentation can limit the blast radius of potential credential interception attacks. It is also advisable to disable remote management features entirely unless absolutely necessary, thereby reducing the attack surface exposed to external networks. Regular monitoring for unusual traffic patterns on administrative ports can help detect ongoing exploitation attempts while longer-term solutions are deployed.