CVE-2025-30410 is a critical security vulnerability identified in Acronis Cyber Protect Cloud Agent and related Acronis Cyber Protect products across Linux, macOS, and Windows platforms. The root cause is a missing authentication mechanism (CWE-306) for critical functions within the agent, allowing unauthenticated attackers to access and manipulate sensitive data. This flaw affects versions prior to build 39870 for the Cloud Agent, 39938 for Cyber Protect 16, and 41800 for Cyber Protect 15. The vulnerability enables remote attackers to bypass authentication controls entirely, leading to unauthorized disclosure and modification of sensitive information managed by the agent. The CVSS v3.0 score of 9.8 reflects the high impact on confidentiality, integrity, and availability, combined with ease of exploitation (network attack vector, no privileges or user interaction required). Although no exploits have been reported in the wild yet, the severity and nature of the vulnerability make it a prime target for attackers aiming to compromise backup and endpoint protection environments. The vulnerability could allow attackers to manipulate backup data, disrupt recovery processes, or exfiltrate sensitive organizational data, severely impacting business continuity and data security. The lack of authentication on critical functions is a fundamental security oversight that necessitates immediate remediation. Organizations should monitor for patches from Acronis and apply them promptly once released. Until patches are available, restricting network access to the agent interfaces and enhancing monitoring for suspicious activity are critical interim measures.

The impact of CVE-2025-30410 is severe and multifaceted. Exploitation can lead to unauthorized disclosure of sensitive data, including backup contents and system configurations, potentially exposing confidential corporate or personal information. Attackers can also manipulate data, undermining the integrity of backups and recovery processes, which may result in corrupted or malicious backups being restored. This compromises business continuity and disaster recovery capabilities, increasing downtime and operational disruption. The vulnerability also threatens availability by allowing attackers to interfere with the agent’s normal operations, potentially disabling protection mechanisms. Given the agent’s role in endpoint and cloud protection, a successful attack could cascade into broader network compromise. The ease of exploitation without authentication or user interaction means attackers can remotely target vulnerable systems at scale. Organizations relying on Acronis Cyber Protect products for critical data protection and endpoint security are at high risk of data breaches, ransomware escalation, and compliance violations. The global reach of Acronis products means the impact could be widespread, affecting enterprises, government agencies, and service providers.

1. Apply official patches from Acronis immediately once they become available to address the missing authentication flaw. 2. Until patches are released, restrict network access to the Acronis Cyber Protect Cloud Agent interfaces using firewalls or network segmentation to limit exposure to trusted management networks only. 3. Implement strict access controls and monitoring on systems running the affected agents to detect and respond to unauthorized access attempts. 4. Use host-based intrusion detection systems (HIDS) to monitor for anomalous activity related to the agent processes. 5. Review and harden configurations of Acronis products to minimize unnecessary exposure of management interfaces. 6. Conduct regular audits of backup integrity and verify the authenticity of backup data to detect manipulation. 7. Educate IT and security teams about this vulnerability and ensure incident response plans include scenarios involving backup system compromise. 8. Consider deploying network-level authentication proxies or VPNs to add an additional authentication layer around the agent’s communication channels. 9. Maintain up-to-date asset inventories to quickly identify and remediate vulnerable instances. 10. Collaborate with Acronis support for guidance and best practices specific to your deployment environment.