CVE-2026-15271 in A3000RU
Summary
by MITRE • 07/10/2026
A security vulnerability has been detected in TOTOLINK A3000RU, A3100R, A950RG, AC1200T10, CP450, CS185R_T10 and EX200 up to 20260906. Affected by this issue is some unknown functionality of the file /etc/boa/boa.conf of the component Web Interface. The manipulation leads to least privilege violation. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitation is known to be difficult.
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Analysis
by VulDB Data Team • 07/10/2026
This vulnerability affects multiple TOTOLINK router models including A3000RU, A3100R, A950RG, AC1200T10, CP450, CS185R_T10, and EX200 devices with firmware versions up to 20260906. The issue resides within the web interface component where the file /etc/boa/boa.conf contains a flaw that allows for privilege escalation attacks. This represents a critical security weakness that compromises the integrity of the device's access control mechanisms and enables unauthorized users to gain elevated privileges beyond their intended permissions.
The technical nature of this vulnerability stems from improper access controls within the web interface configuration file, specifically in how the Boa web server component handles authentication and authorization. When an attacker manipulates the /etc/boa/boa.conf file through remote means, they can potentially bypass normal security restrictions that should limit user privileges to their designated levels. This least privilege violation creates a pathway for attackers to escalate their access rights and gain administrative control over the affected devices.
The operational impact of this vulnerability is severe as it allows for remote exploitation without requiring physical access to the device or specialized knowledge of the underlying system architecture. Attackers can leverage this flaw to execute arbitrary commands on the router, potentially leading to complete system compromise, data exfiltration, or use of the device as a pivot point for further attacks within the network. The high attack complexity rating indicates that while the vulnerability exists, successfully exploiting it requires significant technical expertise and resources, making it less likely to be exploited by casual attackers but still dangerous in the hands of determined threat actors.
From a cybersecurity framework perspective, this vulnerability maps to CWE-284 Access Control Issues, specifically related to improper access control mechanisms within web applications. The ATT&CK framework would categorize this under T1078 Valid Accounts and T1566 Phishing with the potential for privilege escalation once initial access is gained through remote exploitation. The affected devices represent a significant attack surface given their widespread deployment in residential and small office environments where network security may be inadequate, potentially allowing attackers to establish persistent backdoors or use these compromised devices for botnet activities.
Organizations and users should immediately update their TOTOLINK devices to the latest firmware versions available from the manufacturer to remediate this vulnerability. Network segmentation and monitoring should be implemented to detect anomalous behavior that might indicate exploitation attempts. Security professionals should consider implementing intrusion detection systems specifically designed to identify modifications to web server configuration files, as these changes often precede more serious attacks. Additionally, regular security audits of network infrastructure should include verification of device firmware versions and proper access control configurations to prevent unauthorized privilege escalation scenarios.