CVE-2025-30409 in Cyber Protect Cloud Agent
Summary
by MITRE • 04/24/2025
Denial of service due to allocation of resources without limits. The following products are affected: Acronis Cyber Protect Cloud Agent (Windows) before build 39904, Acronis Cyber Protect 17 (Windows) before build 41186.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 03/06/2026
This vulnerability represents a classic resource exhaustion flaw that can lead to system instability and denial of service conditions. The issue manifests when the Acronis Cyber Protect Cloud Agent and Cyber Protect 17 applications fail to implement proper limits on resource allocation during their operational processes. This allows malicious actors or even legitimate but uncontrolled operations to consume excessive system resources such as memory, CPU cycles, or file handles without appropriate bounds checking. The vulnerability specifically affects Windows-based deployments and impacts versions prior to the mentioned build numbers, indicating a regression or oversight in the resource management implementation that has persisted across multiple product iterations.
The technical nature of this flaw aligns with CWE-400, which categorizes resource exhaustion vulnerabilities as a fundamental weakness in application design that allows attackers to deplete system resources through uncontrolled consumption patterns. When the application allocates resources without proper bounds, it creates an environment where an attacker could potentially trigger unlimited memory allocation or process creation that exhausts available system capacity. This type of vulnerability is particularly dangerous in enterprise environments where backup and recovery systems are continuously running and may be targeted to disrupt critical operations. The flaw essentially allows for a form of resource starvation attack that can render the system unresponsive or cause it to crash entirely.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the integrity of backup and recovery operations that organizations rely upon for business continuity. In a production environment, an attacker could exploit this weakness to cause the backup agent to consume all available memory or CPU resources, resulting in backup failures, system instability, and potential data loss scenarios. The vulnerability affects both cloud agent and on-premises versions, suggesting that the root cause lies in the core resource management logic rather than platform-specific implementations. Organizations using these affected versions face significant risk of operational disruption, particularly during peak backup windows when system resources are already under strain.
Mitigation strategies should focus on immediate patching of affected systems to the latest builds that contain proper resource allocation limits. Organizations should also implement monitoring solutions that can detect unusual resource consumption patterns and alert administrators to potential exploitation attempts. Network segmentation and access controls can help limit the attack surface by restricting which systems can interact with the backup agents. The implementation of resource quotas and process monitoring should be considered as additional defensive measures. From an att&ck framework perspective, this vulnerability maps to techniques involving resource exhaustion and denial of service, specifically targeting the availability aspect of the cyber kill chain. Regular security assessments and vulnerability scanning should be conducted to identify other potential resource management flaws in similar backup and recovery systems. System administrators should also consider implementing automated alerting mechanisms that trigger when resource utilization exceeds normal operational thresholds, providing early detection capabilities for potential exploitation attempts.