CVE-2025-56802 identifies a cryptographic vulnerability in the Reolink desktop application, which is used to manage Reolink security camera systems. The application encrypts user configuration files stored in the Windows %APPDATA% directory using AES encryption. However, the encryption key is hard-coded and predictable, violating secure cryptographic practices (CWE-321). This means that any attacker who gains local access to the system can decrypt these configuration files, potentially exposing sensitive data such as user credentials, network configurations, or camera settings. The vulnerability does not require privileges or user interaction, making it easier to exploit in environments where local access is possible. The supplier contests the vulnerability, claiming the key is randomly generated per installation, but the CVE remains published with a CVSS score of 5.1 (medium severity). There are no known exploits in the wild, and no patches have been released yet. The vulnerability primarily impacts confidentiality, with no direct effect on integrity or availability. This issue is distinct from CVE-2025-56801, indicating multiple cryptographic weaknesses in the Reolink software. Given the nature of the vulnerability, attackers would need local access, which limits remote exploitation but still poses a risk in shared or compromised environments.

For European organizations, this vulnerability could lead to unauthorized disclosure of sensitive configuration data related to Reolink security camera systems if an attacker gains local access to affected machines. This could facilitate further attacks such as network reconnaissance, credential theft, or manipulation of security camera settings. Organizations relying on Reolink for physical security may face increased risk of surveillance circumvention or privacy breaches. The impact is particularly relevant for sectors with high security requirements such as government, critical infrastructure, and enterprises using Reolink devices for monitoring. While the vulnerability does not allow remote exploitation, insider threats, compromised endpoints, or attackers with physical access could leverage this weakness. The lack of patches and the supplier's denial may delay remediation, prolonging exposure. Confidentiality loss could undermine trust in security systems and complicate compliance with data protection regulations like GDPR if personal data is exposed.

European organizations should immediately restrict local access to systems running the Reolink desktop application by enforcing strict access controls and endpoint security policies. Use disk encryption and strong OS-level authentication to reduce the risk of unauthorized local access. Monitor endpoints for suspicious activity indicative of local compromise. Avoid storing sensitive configuration data on shared or multi-user systems. Regularly audit installed software versions and configurations to identify vulnerable instances. Engage with Reolink support to obtain official guidance and request timely patches or updates addressing this vulnerability. Consider isolating Reolink management workstations from general user environments. If possible, export and securely store configuration data externally to minimize exposure. Implement network segmentation to limit lateral movement from compromised hosts. Finally, prepare incident response plans to address potential data exposure scenarios involving this vulnerability.