CVE-2026-33390 in Guardian
Summary
by MITRE • 07/09/2026
An Incorrect Privilege Assignment vulnerability was discovered in the synchronization functionality due to Arc sensors receiving CLI permissions. An authenticated user with limited privileges can push administrative CLI commands through the sync, altering the device configuration, and/or affecting its availability.
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Analysis
by VulDB Data Team • 07/09/2026
This vulnerability represents a critical privilege escalation flaw that undermines the security model of the affected system through improper access control implementation. The issue manifests within the synchronization functionality where Arc sensors are incorrectly granted command-line interface permissions that should be restricted to administrative users only. This misconfiguration creates a pathway for authenticated users with limited privileges to execute administrative commands through the legitimate sync process, effectively bypassing the intended security boundaries.
The technical flaw stems from inadequate privilege validation mechanisms within the synchronization component, allowing unauthorized command execution through a legitimate system interface. When an authenticated user initiates a synchronization operation, the system fails to properly validate whether the user possesses the necessary administrative privileges before permitting CLI command execution. This design oversight creates a direct attack vector where privilege escalation occurs silently during normal operational procedures, making detection particularly challenging for security monitoring systems.
The operational impact of this vulnerability extends beyond simple configuration changes to encompass potential service disruption and unauthorized access to sensitive system functions. An attacker could manipulate device configurations to disable security features, modify access controls, or redirect system resources while maintaining persistent access through the synchronization channel. The availability aspect becomes particularly concerning as malicious actors could potentially cause denial-of-service conditions by altering critical system parameters or disabling essential services during synchronization processes.
This vulnerability aligns with CWE-276, which addresses improper privilege assignment and inadequate access control mechanisms in software systems. The flaw demonstrates characteristics consistent with the ATT&CK technique T1068, which involves exploiting legitimate credentials to execute administrative commands through authorized system interfaces. Organizations implementing this system face significant risk of unauthorized configuration changes that could compromise entire network infrastructures if multiple devices share similar privilege assignment flaws.
Mitigation strategies should focus on implementing strict privilege validation during synchronization operations and establishing role-based access controls that prevent non-administrative users from executing privileged CLI commands. System administrators must ensure that the synchronization functionality enforces proper authentication and authorization checks before allowing any administrative command execution, regardless of the user's initial privilege level or the legitimate nature of their synchronization request. Regular security audits should verify that privilege assignments remain appropriate and that no unauthorized access paths exist within the system's synchronization mechanisms.