CVE-2026-33906 is an improper privilege management vulnerability (CWE-269) affecting ellanetworks core, a 5G core solution designed for private networks. In versions before 1.7.0, the NetworkManager role was granted backup and restore permissions, including access to a restore endpoint that accepted any valid SQLite database file without validating its contents. This lack of validation allowed an attacker with NetworkManager privileges to craft a malicious SQLite database file and use the restore functionality to overwrite the production database. By doing so, the attacker could escalate their privileges to the Admin role, which has broader access rights including user management, audit logs, debug endpoints, and operator identity configuration. This privilege escalation bypasses intended role-based access controls, compromising confidentiality, integrity, and availability of the system. The vulnerability was mitigated in version 1.7.0 by removing backup and restore permissions from the NetworkManager role, effectively preventing this attack vector. The CVSS 3.1 score of 7.2 reflects the network attack vector, low attack complexity, high privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No public exploits have been reported, but the vulnerability poses significant risk if exploited due to the sensitive nature of the affected systems.

The impact of CVE-2026-33906 is significant for organizations deploying ellanetworks core in their private 5G networks. Successful exploitation allows a NetworkManager—who normally has limited privileges—to escalate to Admin, gaining full control over critical system functions. This includes managing user accounts, accessing audit logs (potentially covering tracks), manipulating debug endpoints, and altering operator identity configurations. Such control could lead to unauthorized data access, system manipulation, disruption of network services, and persistent backdoors. The compromise of operator identity configuration could also facilitate further attacks or impersonation within the network. Given the role of 5G cores in critical infrastructure and enterprise communications, this vulnerability could disrupt business operations, violate regulatory compliance, and expose sensitive data. Although no exploits are currently known in the wild, the ease of exploitation by an insider or compromised NetworkManager elevates the risk profile. Organizations relying on affected versions face potential insider threats and must act swiftly to prevent privilege escalation and maintain network integrity.

To mitigate CVE-2026-33906, organizations should immediately upgrade ellanetworks core to version 1.7.0 or later, where the backup and restore permissions have been removed from the NetworkManager role. Until upgrade is possible, restrict NetworkManager role assignments to trusted personnel only and monitor their activities closely. Implement strict access controls and audit logging on backup and restore operations to detect any unauthorized attempts. Validate and verify all database restore files before applying them, ideally by restricting restore operations to Admins or a dedicated, highly trusted role. Employ network segmentation and least privilege principles to limit the potential impact of compromised accounts. Regularly review role definitions and permissions to ensure they align with the principle of least privilege. Additionally, conduct security awareness training for administrators to recognize and report suspicious activity related to database restores. Finally, maintain up-to-date backups and test recovery procedures to minimize downtime in case of compromise.