CVE-2025-66164 identifies a Missing Authorization vulnerability in the merkulove Laser product, affecting all versions up to and including 1.1.1. The core issue is an incorrectly configured access control mechanism that fails to properly enforce security levels, allowing users with low privileges (PR:L) to perform actions or access resources beyond their intended authorization scope. The vulnerability is exploitable remotely over the network (AV:N) without requiring user interaction (UI:N), which increases the risk of automated or remote exploitation. The CVSS v3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N) indicates that the attack complexity is low, privileges required are low, and the scope remains unchanged, with limited impact on confidentiality and integrity but no impact on availability. Although no known exploits are currently reported in the wild and no patches have been released, the vulnerability poses a moderate risk, especially in environments where merkulove Laser is exposed to untrusted networks or used by multiple users with varying privilege levels. The lack of proper authorization checks can lead to unauthorized data disclosure or modification, potentially compromising sensitive information or disrupting workflows. Organizations should prioritize reviewing access control configurations, restrict network exposure of the affected product, and implement monitoring to detect suspicious activities related to this vulnerability.

For European organizations, the impact of CVE-2025-66164 depends on the deployment scale and criticality of merkulove Laser within their infrastructure. Unauthorized access or modification of data due to missing authorization controls can lead to data breaches, intellectual property theft, or operational disruptions. Sectors such as design, creative agencies, or industries relying on merkulove Laser for laser-related workflows may face confidentiality and integrity risks. Although availability is not directly impacted, the indirect effects of data tampering or unauthorized access could affect business processes and trust. The medium severity score reflects a moderate risk level, but the ease of exploitation over the network without user interaction increases urgency for mitigation. European organizations with remote or multi-user access to the product are particularly vulnerable. Additionally, regulatory frameworks like GDPR impose strict data protection requirements, so unauthorized data access could lead to compliance violations and financial penalties.

1. Conduct a thorough audit of access control configurations within merkulove Laser to ensure proper authorization enforcement aligned with the principle of least privilege. 2. Restrict network exposure of the merkulove Laser service by implementing network segmentation and firewall rules to limit access only to trusted users and systems. 3. Monitor logs and network traffic for unusual access patterns or attempts to exploit authorization weaknesses. 4. Implement multi-factor authentication (MFA) where possible to reduce risk from compromised credentials. 5. Engage with merkulove vendor channels to obtain patches or updates as soon as they become available and apply them promptly. 6. Educate users about the risks of privilege misuse and enforce strict user role management. 7. Consider deploying intrusion detection/prevention systems (IDS/IPS) tuned to detect exploitation attempts targeting this vulnerability. 8. If feasible, isolate critical data and workflows from the affected product until a patch is applied to minimize exposure.