Appsync CVE-2026-22767

Dell AppSync version 4.6.0 only. Requires low-privilege local user access to the system running AppSync. No user interaction needed. Attacker exploits symlink following vulnerability in file operations to read/modify sensitive files.

Real-world risk is moderate despite the High CVSS 7.3 score. The CVSS vector (AV:L/AC:L/PR:L/UI:N) indicates local access vector requiring low-privileged authentication, which substantially constrains the attacker pool to users with existing system access. Attack complexity is low and requires no user interaction, making exploitation straightforward once local access is obtained. The impact profile (C:L/I:H/A:H) shows limited confidentiality impact but high integrity and availability impact, suggesting potential for data tampering or service disruption. No EPSS score is available, but historical data for local symlink vulnerabilities typically shows low exploitation probability in enterprise environments with proper access controls. No CISA KEV listing or public exploit code exists, indicating this is not being actively exploited in the wild. The primary risk scenario involves insider threats or compromised low-privileged accounts in environments running Dell AppSync 4.6.0. Organizations without this specific version or with strong internal access controls face minimal risk. This should be prioritized below remotely exploitable vulnerabilities but addressed in regular patching cycles, especially for systems with multiple local users or exposed to potential privilege escalation chains.

An attacker who has compromised a low-privileged local account on a server running Dell AppSync 4.6.0 identifies a privileged AppSync process that performs file operations in a directory where they can create symbolic links. The attacker creates a malicious symlink pointing from an expected AppSync configuration or data file path to a sensitive system file such as authentication databases, application configurations, or system binaries. When the privileged AppSync process next performs its file operation following the attacker's symlink, it inadvertently modifies the target sensitive file with the elevated privileges of the AppSync service. This could allow the attacker to tamper with critical system files, inject malicious configurations, or corrupt application data, potentially leading to further privilege escalation, service disruption, or unauthorized access to protected information.