CVE-2025-30415 Overview
CVE-2025-30415 is a denial of service vulnerability in Acronis Cyber Protect Cloud Agent and Acronis Cyber Protect 17. The flaw arises from improper handling of malformed input [CWE-1286]. A remote attacker can send crafted input to trigger a denial of service condition without authentication or user interaction.
The issue affects Acronis Cyber Protect Cloud Agent for Linux, macOS, and Windows prior to build 40077. It also affects Acronis Cyber Protect 17 for Linux, macOS, and Windows prior to build 41186. Acronis published Security Advisory SEC-8646 addressing the issue.
Critical Impact
Unauthenticated remote attackers can cause a denial of service against Acronis backup and protection agents, disrupting data protection operations across endpoints.
Affected Products
- Acronis Cyber Protect Cloud Agent for Linux, macOS, and Windows before build 40077
- Acronis Cyber Protect 17 for Linux, macOS, and Windows before build 41186
Discovery Timeline
- 2025-06-04 - CVE-2025-30415 published to the National Vulnerability Database
- 2026-04-15 - Last updated in NVD database
Technical Details for CVE-2025-30415
Vulnerability Analysis
The vulnerability resides in the input processing logic of the Acronis Cyber Protect agent. The agent fails to correctly validate the syntactic and semantic structure of incoming data. When malformed input reaches the affected component, the agent enters an error state that prevents continued operation.
This weakness corresponds to [CWE-1286]: Improper Validation of Syntactic Correctness of Input. The agent accepts data that does not conform to the expected grammar or schema. Improperly validated input leads to resource consumption or process termination, halting backup and protection workloads.
With an EPSS score of 0.319%, public exploitation activity has not been observed. However, the network-accessible nature of the agent expands the attack surface.
Root Cause
The root cause is missing or insufficient validation of incoming protocol or message data within the Acronis agent. The parsing routines do not reject all malformed structures before further processing. Acronis has not released technical specifics regarding the affected component.
Attack Vector
An unauthenticated attacker sends specially crafted malformed input to the Acronis agent over the network. The attacker requires no privileges and no user interaction. Successful exploitation crashes or hangs the agent process, interrupting scheduled backups, restores, and protection enforcement. The vulnerability does not affect data confidentiality or integrity.
See the Acronis Security Advisory SEC-8646 for vendor-supplied technical context.
Detection Methods for CVE-2025-30415
Indicators of Compromise
- Repeated crashes or unexpected restarts of the Acronis agent service on Linux, macOS, or Windows endpoints
- Failed or aborted backup jobs without corresponding administrator-initiated actions
- Anomalous inbound traffic to Acronis agent listening ports from untrusted networks
Detection Strategies
- Inventory all systems running Acronis Cyber Protect Cloud Agent and Acronis Cyber Protect 17 and confirm build numbers against 40077 and 41186 respectively
- Monitor the Acronis agent process lifecycle for abnormal termination events and reaper restarts
- Correlate agent service crashes with inbound network connections to identify attempted exploitation
Monitoring Recommendations
- Forward Acronis agent logs and operating system service control events to a centralized logging platform for correlation
- Alert on backup job failure spikes that coincide with agent process exits
- Track network connections to agent ports from sources outside the management network
How to Mitigate CVE-2025-30415
Immediate Actions Required
- Update Acronis Cyber Protect Cloud Agent to build 40077 or later across all Linux, macOS, and Windows endpoints
- Update Acronis Cyber Protect 17 to build 41186 or later on all supported platforms
- Restrict network exposure of the Acronis agent to trusted management segments only
- Validate backup job completion after patching to confirm agent stability
Patch Information
Acronis has released fixed builds addressing CVE-2025-30415. Apply Acronis Cyber Protect Cloud Agent build 40077 or later, and Acronis Cyber Protect 17 build 41186 or later. Refer to Acronis Security Advisory SEC-8646 for the official remediation guidance.
Workarounds
- Apply firewall rules limiting inbound access to Acronis agent ports to authorized management hosts
- Place Acronis agents behind network segmentation that restricts untrusted source addresses
- Monitor agent availability and automate service restart procedures while patching is staged
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
