CVE-2026-35905 in T625Pro
Summary
by MITRE • 06/04/2026
T3 Technology CPE models T625Pro v1.0.07, T6825G v1.0.03, and T7281 v1.0.03 were discovered to contain a hardcoded password for root access under the "superadmin" account.
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Analysis
by VulDB Data Team • 06/04/2026
This vulnerability represents a critical security flaw in T3 Technology CPE devices including models T625Pro v1.0.07, T6825G v1.0.03, and T7281 v1.0.03 where a hardcoded password is embedded within the firmware for the superadmin account. The presence of hardcoded credentials violates fundamental security principles and creates a persistent backdoor that remains accessible regardless of system updates or user password changes. This flaw falls under CWE-259 Weak Passwords and CWE-798 Use of Hardcoded Credentials, both of which are categorized as high-risk vulnerabilities in the CWE database. The vulnerability enables unauthorized remote access to network equipment that should be protected by strong authentication mechanisms, potentially allowing attackers to gain full administrative control over the affected devices.
The technical implementation of this flaw involves the inclusion of a fixed password string within the device firmware code or configuration files, typically stored in plain text or minimally obfuscated formats. Attackers can exploit this weakness by simply logging into the device using the superadmin account with the hardcoded credentials, bypassing all normal authentication procedures. This creates an immediate and persistent threat vector that remains active until the device is physically reconfigured or replaced, as the password cannot be changed through normal administrative procedures. The vulnerability affects the authentication mechanism of the device, undermining the principle of least privilege and providing attackers with elevated privileges that could be used to manipulate device configurations, access network traffic, or establish persistent access points within the network infrastructure.
The operational impact of this vulnerability extends beyond individual device compromise to potentially affect entire network infrastructures. Network administrators who rely on these devices for critical network operations face significant risk of unauthorized access, data breaches, or network disruption. The vulnerability can be exploited by attackers at scale, particularly in environments where multiple devices of the same model are deployed without proper security hardening. This threat is exacerbated by the fact that many network administrators may not be aware of the presence of these hardcoded credentials, leading to prolonged exposure periods. The vulnerability can be leveraged for lateral movement within networks, as compromised devices often serve as access points to other network segments, making it a valuable tool for attackers seeking to establish persistent presence within enterprise environments.
Mitigation strategies for this vulnerability require immediate action to address the hardcoded credential issue. Organizations should implement comprehensive device inventory management to identify all affected devices and verify their current configuration status. The most effective immediate solution involves physically replacing the affected devices or implementing firmware updates from T3 Technology that remove the hardcoded credentials and enforce strong authentication mechanisms. Network segmentation should be implemented to limit the impact of any successful exploitation attempts, while monitoring systems should be deployed to detect unauthorized access attempts. Security teams should also consider implementing device authentication verification procedures and establishing protocols for regular security assessments of network equipment. From an ATT&CK framework perspective, this vulnerability maps to T1078 Valid Accounts and T1566 Phishing, as it enables adversaries to establish persistent access using legitimate administrative credentials. Organizations should also consider implementing network access control policies and regular penetration testing to identify similar hardcoded credential vulnerabilities in other network equipment and systems.