CVE-2025-24831 is a vulnerability classified under CWE-428 (Unquoted Search Path or Element) affecting the Acronis Cyber Protect Cloud Agent on Windows platforms prior to build 39378. The flaw stems from the software's use of unquoted paths when launching executables or scripts, which can be exploited by an attacker with local access to insert a malicious executable in a directory that is searched before the legitimate one. When the agent runs, it may inadvertently execute the attacker's code with elevated privileges, leading to local privilege escalation. The CVSS v3.0 score is 6.6, reflecting a medium severity with high confidentiality and integrity impact but no availability impact. Exploitation requires low complexity, local privileges, and user interaction, indicating that an attacker must have some foothold on the system and trick the user or system into executing the malicious path. No patches or exploits are currently publicly available, but the vulnerability is recognized and tracked by CISA. This vulnerability is critical for environments where Acronis Cyber Protect Cloud Agent is deployed, as it could allow attackers to gain administrative control on endpoints, potentially compromising backup and protection mechanisms.

The primary impact of CVE-2025-24831 is local privilege escalation, enabling attackers with limited access to gain higher privileges on affected systems. This can lead to unauthorized access to sensitive data, modification or deletion of backup configurations, and potential disruption of endpoint protection services. Organizations relying on Acronis Cyber Protect Cloud Agent for backup and cybersecurity risk having their defenses bypassed or disabled, increasing exposure to ransomware or other malware attacks. The confidentiality and integrity of data are at high risk, while availability is not directly impacted. The vulnerability could be leveraged in targeted attacks against organizations with sensitive data or critical infrastructure, especially if combined with other attack vectors to gain initial local access.

To mitigate CVE-2025-24831, organizations should: 1) Monitor Acronis communications for official patches or updates and apply them promptly once released. 2) Restrict local user permissions to prevent unauthorized file placement in directories included in the agent’s search path. 3) Implement application whitelisting and path hardening to ensure only trusted executables run with elevated privileges. 4) Conduct regular audits of system PATH environment variables and executable locations to detect unquoted paths or insecure directory permissions. 5) Educate users about the risks of executing unknown files and the importance of reporting suspicious activity. 6) Use endpoint detection and response (EDR) tools to monitor for unusual privilege escalation attempts. 7) Consider isolating critical backup agents on hardened systems with minimal user interaction to reduce attack surface.