CVE-2026-92376 in Remote Management
Summary
by MITRE • 10/27/2026
Improper authentication in the inter-process communication (IPC) mechanism of TeamViewer Remote Management Monitoring for Windows prior to version 26.10.1 allows a local authenticated attacker with low privileges to impersonate the IPC broker and cause the Monitoring service to execute arbitrary code with NT AUTHORITY\SYSTEM privileges, resulting in local privilege escalation.
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Analysis
by VulDB Data Team • 10/27/2026
The vulnerability identified involves a critical flaw within the inter-process communication architecture of TeamViewer Remote Management Monitoring for Windows prior to version 26.10.1. This specific component serves as a bridge allowing different processes on the same system to exchange data and signals, which is essential for the remote management functionality to operate correctly across various user contexts. The core technical deficiency lies in an improper authentication mechanism that fails to adequately verify the identity of requesting processes before granting access to sensitive IPC endpoints. By neglecting rigorous validation checks during the handshake or message routing phase, the system inadvertently trusts input from sources that have not been sufficiently authenticated against strict security policies designed for privileged operations.
This architectural weakness enables a local attacker who has already gained low-privilege user access on the target machine to exploit the flaw through process impersonation techniques. Once inside this constrained environment, the adversary can craft specific requests directed at the IPC broker, effectively masquerading as a legitimate system component or service that is authorized to communicate with the Monitoring daemon. Because the authentication check is bypassed or insufficiently enforced, the Monitoring service accepts these forged messages without raising an alarm. This misdirection allows the attacker to inject malicious payloads into the execution flow of the privileged service, leveraging its inherent trust relationship with the operating system kernel and security subsystems.
The operational impact of this vulnerability is severe due to the resulting local privilege escalation. When the compromised Monitoring service processes the injected commands, it executes them under the context of NT AUTHORITY\SYSTEM, which represents the highest level of access rights within a Windows environment. This account possesses unrestricted control over all resources on the computer and can modify any security settings or install software without restriction. Consequently, an attacker who initially possessed only basic user privileges can elevate their status to full administrative dominance, potentially leading to complete system compromise, data exfiltration, persistence mechanisms establishment, and lateral movement within a networked environment where this machine serves as a foothold.
From a classification perspective, this issue aligns with CWE-287, which denotes Improper Authentication, specifically highlighting the failure to properly verify identity before granting access. Furthermore, in terms of tactical behavior observed during exploitation, it maps closely to MITRE ATT&CK technique T1068 Exploitation for Privilege Escalation, where attackers leverage software vulnerabilities or misconfigurations to gain higher-level permissions. The attack vector also reflects aspects of T1548 Abuse Elevation Control Mechanism, as the attacker manipulates the elevation controls inherent in the IPC mechanism to bypass standard security boundaries that would normally prevent low-privilege processes from interacting with high-privilege services directly.
To mitigate this risk and restore secure operation, organizations must prioritize immediate patching of all affected TeamViewer installations by upgrading to version 26.10.1 or later, where the authentication logic for IPC mechanisms has been corrected. In environments where immediate patching is not feasible due to operational constraints, administrators should implement strict network segmentation to isolate systems running vulnerable versions from untrusted networks and enforce least-privilege principles across all user accounts to limit the potential impact of a local compromise. Additionally, deploying endpoint detection and response solutions that monitor for anomalous process creation events involving system-level services can help detect exploitation attempts in real time by identifying unexpected interactions between low-privileged processes and high-privileged daemons via IPC channels.