CVE-2025-30415 is a high-severity vulnerability affecting the Acronis Cyber Protect Cloud Agent across Linux, macOS, and Windows platforms prior to build 40077. The vulnerability is classified under CWE-1286, which pertains to improper handling of malformed input leading to denial of service (DoS). Specifically, the agent improperly processes certain malformed inputs, which can cause the software to crash or become unresponsive, thereby denying legitimate users access to its services. The vulnerability does not impact confidentiality or integrity but severely affects availability. The CVSS 3.0 base score is 7.5, reflecting a network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no impact on confidentiality or integrity (C:N/I:N), and high impact on availability (A:H). No known exploits are currently reported in the wild, and no patches are linked yet, indicating that remediation may still be pending or in progress. The vulnerability affects all versions of the Acronis Cyber Protect Cloud Agent before build 40077, but the exact affected versions are unspecified. Given the agent’s role in cybersecurity protection and backup management, a DoS condition could disrupt critical security operations and data protection workflows.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on Acronis Cyber Protect Cloud Agent for endpoint protection, backup, and recovery services. A successful exploitation could lead to denial of service, rendering the agent inoperative and potentially exposing systems to further risks due to lack of active protection or backup failures. This disruption could affect business continuity, especially in sectors with stringent data protection and uptime requirements such as finance, healthcare, and critical infrastructure. The cross-platform nature of the agent means that organizations with heterogeneous environments are at risk. Additionally, since no authentication or user interaction is required, attackers can remotely trigger the DoS condition, increasing the threat surface. Although no exploits are currently known in the wild, the high CVSS score and ease of exploitation suggest that threat actors may develop exploits, increasing risk over time.

Organizations should prioritize updating the Acronis Cyber Protect Cloud Agent to build 40077 or later once the patch is officially released. Until then, network-level mitigations can help reduce exposure, such as restricting access to the agent’s network interfaces to trusted management systems only, employing firewall rules to limit inbound traffic, and monitoring network traffic for anomalous or malformed packets targeting the agent. Implementing robust network segmentation can isolate critical systems running the agent to minimize potential impact. Additionally, organizations should maintain comprehensive monitoring and alerting to detect service disruptions promptly. Engaging with Acronis support for interim guidance and applying any available vendor workarounds is recommended. Finally, organizations should review their incident response plans to include scenarios involving DoS of security agents to ensure rapid recovery and continuity.