CVE-2025-40838 in Indoor Connect 8855
Summary
by MITRE • 09/25/2025
Ericsson Indoor Connect 8855 contains a vulnerability where server-side security can be bypassed in the client which if exploited can lead to unauthorized disclosure of user accounts.
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Analysis
by VulDB Data Team • 09/26/2025
The CVE-2025-40838 vulnerability affects Ericsson Indoor Connect 8855, a network infrastructure device that serves as a critical component in enterprise and industrial wireless communication systems. This device operates as a client-side component within Ericsson's indoor connectivity solutions, managing user authentication and access control for wireless networks. The vulnerability represents a significant security flaw in the server-side security implementation that directly impacts client-side operations, creating a potential attack vector that could compromise user account integrity and confidentiality. The Indoor Connect 8855 is commonly deployed in environments requiring secure wireless access control, making this vulnerability particularly concerning for organizations relying on Ericsson's indoor connectivity solutions for critical operations.
The technical flaw manifests as a security bypass mechanism within the client-side implementation that allows unauthorized access to user account information. This vulnerability stems from inadequate validation of authentication tokens or session management protocols during client-server communication. Attackers can exploit this weakness to circumvent the normal security controls that should protect user account data from unauthorized disclosure. The vulnerability likely involves improper handling of authentication state information or insufficient verification of client credentials before granting access to user account details. This type of flaw typically falls under CWE-285, which addresses improper authorization issues, and may also relate to CWE-306, concerning missing authentication mechanisms. The security bypass occurs during the client-side processing phase where server-side authentication controls are not properly enforced or validated.
The operational impact of this vulnerability extends beyond simple data disclosure, potentially enabling attackers to gain unauthorized access to user accounts and their associated privileges. Organizations using Indoor Connect 8855 devices may face unauthorized access to wireless network resources, potential data breaches, and compromise of sensitive communications within their indoor wireless environments. The vulnerability could allow attackers to escalate privileges, access restricted network resources, or perform unauthorized operations within the wireless network infrastructure. From an operational standpoint, this vulnerability undermines the fundamental security posture of wireless access control systems, potentially affecting business continuity, regulatory compliance, and data protection requirements. The attack surface is particularly concerning given that Indoor Connect 8855 devices often serve as gateways for critical enterprise and industrial wireless communications.
Security mitigations for CVE-2025-40838 should prioritize immediate firmware updates from Ericsson to address the server-side security bypass vulnerability. Organizations should implement network segmentation to isolate Indoor Connect 8855 devices from critical systems and establish monitoring protocols to detect unauthorized access attempts. The implementation of additional authentication layers, such as multi-factor authentication, can provide defense-in-depth against exploitation attempts. Network administrators should conduct thorough security assessments of their wireless infrastructure to identify any unauthorized access that may have occurred due to this vulnerability. From an ATT&CK framework perspective, this vulnerability aligns with techniques involving credential access and privilege escalation, making it important for security teams to monitor for suspicious authentication patterns and unauthorized account access. Regular vulnerability scanning and penetration testing should be conducted to identify similar security gaps in the wireless infrastructure ecosystem.