CVE-2026-41562 in Norvis Backup Plugin
Summary
by MITRE • 10/06/2026
Unauthenticated Sensitive Data Exposure in Norvis Backup <= 1.1.0 versions.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as an unauthenticated sensitive data exposure within Norvis Backup versions prior to or equal to 1.1.0 represents a critical failure in access control mechanisms, allowing attackers to retrieve confidential information without valid credentials. This flaw typically stems from the improper implementation of authentication checks on specific API endpoints or administrative interfaces that handle backup configurations, logs, or stored files. In many network-attached storage and backup solutions, developers may inadvertently expose internal management functions to public networks under the assumption that physical security or default configuration changes will prevent unauthorized access. However, when these safeguards are absent or misconfigured, any actor with network connectivity can interact directly with the service endpoints to extract sensitive data such as database connection strings, encryption keys, user credentials stored in plaintext or weakly hashed formats, and potentially entire backup archives containing organizational intellectual property or personal identifiable information.
From a technical perspective, this vulnerability aligns closely with CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, often categorized under the broader umbrella of CWE-798: Use of Hard-coded Credentials if default administrative accounts are left active and unmodified. The root cause frequently involves insufficient validation of session tokens or API keys before processing requests that return sensitive payloads. Attackers can exploit this by sending crafted HTTP GET or POST requests to specific paths, such as /api/v1/backup/config or similar endpoints depending on the application's architecture, bypassing any intended authentication middleware. This lack of enforcement allows for automated scanning tools to rapidly enumerate and harvest data across multiple instances if they are exposed via NAT rules or firewall misconfigurations that permit inbound traffic from untrusted networks.
The operational impact of this vulnerability is severe, potentially leading to full system compromise through credential reuse attacks where stolen passwords grant access to other corporate systems using the same credentials. Additionally, exposure of encryption keys can render encrypted backups useless for recovery purposes if an attacker modifies or deletes them, effectively enabling a ransomware-style scenario without the need for malware deployment. The leakage of internal network topology details often found in backup configurations further aids attackers in lateral movement within the target environment. This aligns with MITRE ATT&CK technique T1005: Data from Local System and potentially T1530: Data from Cloud Storage Object, depending on how Norvis Backup integrates with external storage backends. The ability to exfiltrate data without detection is particularly dangerous as it may remain unnoticed for extended periods, increasing the blast radius of a breach significantly.
Mitigation strategies must prioritize immediate remediation by upgrading to a version of Norvis Backup that addresses this access control flaw, ensuring that all administrative interfaces are strictly bound to localhost or require multi-factor authentication and strong cryptographic verification. Network segmentation is critical; backup management planes should never be exposed directly to the internet but rather isolated within secure internal networks with strict firewall rules limiting source IP ranges to known administrator workstations. Furthermore, organizations must enforce a policy of changing default credentials upon deployment and regularly audit API endpoints for proper authorization checks using automated vulnerability scanning tools that specifically test for broken object level authorization flaws. Regular security assessments should include penetration testing focused on authentication bypasses to ensure that no sensitive data remains accessible via unauthenticated requests in production environments.