CVE-2026-6423 in ESET Inspect Connector
Summary
by MITRE • 07/16/2026
A local privilege escalation vulnerability in ESET Inspect Connector. The vulnerability was caused by improper authentication in an IPC channel.
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Analysis
by VulDB Data Team • 07/16/2026
The ESET Inspect Connector local privilege escalation vulnerability represents a critical security flaw that allows unauthenticated local attackers to escalate their privileges within the system. This vulnerability specifically manifests through improper authentication mechanisms within an inter-process communication channel, creating an attack vector that bypasses normal access controls. The flaw exists in how the connector handles IPC communications, where insufficient validation of caller credentials enables malicious processes to impersonate legitimate system components and gain elevated privileges.
This technical weakness falls under the category of inadequate authentication as identified by CWE-287, which addresses improper authentication mechanisms within software systems. The vulnerability is particularly dangerous because it operates at the local privilege escalation level, meaning that any user with access to the system can potentially exploit this flaw without requiring remote network access or complex attack vectors. The IPC channel serves as a communication pathway between different system components, but the absence of proper authentication checks allows unauthorized processes to establish connections and execute privileged operations.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it enables attackers to gain full administrative control over systems running ESET Inspect Connector. This access can be leveraged to modify system configurations, install malicious software, access sensitive data, or even disable security controls. The attack surface is particularly concerning given that local privilege escalation vulnerabilities are often overlooked during security assessments since they require physical access or initial compromise of a user account, but once exploited, they provide persistent and powerful access to the target system.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1068 which covers local privilege escalation through improper authentication mechanisms. The exploitability is enhanced by the fact that IPC channels are often less scrutinized than network-facing services, making them attractive targets for attackers seeking to maintain persistence and escalate privileges. Security professionals should consider implementing monitoring for unusual IPC activity patterns and ensure that all inter-process communication channels enforce proper authentication and authorization checks.
Mitigation strategies should include immediate patching of affected ESET Inspect Connector versions, implementation of proper access control lists on IPC resources, and regular security auditing of system components that handle inter-process communications. Organizations should also deploy monitoring solutions that detect anomalous privilege escalation attempts and ensure that all system components follow secure coding practices as outlined in industry standards such as the OWASP Secure Coding Practices. Additionally, implementing principle of least privilege configurations for system services and regularly reviewing access permissions can significantly reduce the risk exposure associated with this class of vulnerabilities.
The vulnerability underscores the importance of comprehensive security testing across all system components, particularly those handling inter-process communications. It demonstrates how seemingly minor authentication oversights in system design can create significant security risks that compromise entire systems. Regular security assessments should specifically target IPC mechanisms and validate that proper authentication and authorization controls are in place to prevent unauthorized access to privileged system functions.
Organizations utilizing ESET Inspect Connector must recognize this vulnerability as a critical threat requiring immediate remediation, as it represents a fundamental flaw in the system's privilege management architecture. The combination of local access requirements with high-impact consequences makes this vulnerability particularly concerning for enterprise environments where multiple users may have access to systems running affected software versions. Regular security updates and continuous monitoring remain essential practices for protecting against such vulnerabilities that exploit authentication weaknesses in system components.