CVE-2026-19639 in Security Center
Summary
by MITRE • 08/14/2026
An improper access control vulnerability exists where an authenticated non-administrative application user could potentially view settings outside of their assigned scope.
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Analysis
by VulDB Data Team • 08/14/2026
This vulnerability represents a critical access control flaw that undermines the fundamental security principle of least privilege within application systems. The issue manifests when authenticated users who do not possess administrative privileges can still access configuration settings and system parameters that should be restricted to authorized administrative personnel only. This misconfiguration creates an unauthorized information disclosure scenario where sensitive operational data, user configurations, and system parameters become accessible to individuals who lack proper authorization levels.
The technical root cause typically stems from insufficient input validation and inadequate scope verification mechanisms within the application's authorization framework. When users authenticate to the system, their access permissions should be strictly enforced based on their assigned roles and privileges. However, in this scenario, the application fails to properly validate whether a user has legitimate access rights to specific settings or configuration data. This weakness can occur due to flawed role-based access control implementations, missing permission checks, or improper session management that allows privilege escalation through indirect access paths.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more severe security compromises. An attacker with basic user credentials could gain visibility into system configurations that reveal network topology, database connection strings, API keys, and other sensitive parameters that might facilitate further attacks. This access could lead to privilege escalation attempts, lateral movement within the network, or exploitation of additional vulnerabilities discovered through the exposed configuration data. The vulnerability aligns with CWE-285 which specifically addresses improper authorization in software systems, and maps to ATT&CK technique T1078 for valid accounts and T1566 for credential access through unauthorized system access.
Organizations should implement comprehensive mitigations including strict enforcement of role-based access controls, implementation of proper input validation for all access requests, and regular security testing to identify unauthorized access paths. The solution requires robust session management with explicit permission checks at every access point, clear separation of administrative and user interfaces, and thorough logging of access attempts for monitoring and forensic analysis purposes. Additionally, regular code reviews focusing on authorization logic, implementation of automated access control testing, and establishment of proper privilege escalation controls are essential measures to prevent such vulnerabilities from persisting in production environments.