CVE-2025-30407 is a local privilege escalation vulnerability identified in the Acronis Cyber Protect Cloud Agent for Windows, specifically affecting versions prior to build 39713. The underlying weakness is classified under CWE-426, which pertains to untrusted search path or binary hijacking vulnerabilities. In this context, the agent improperly handles the loading of executable binaries, allowing an attacker with local access to substitute or insert malicious binaries that the agent will execute with elevated privileges. This flaw enables an attacker to escalate their privileges on the affected system, potentially gaining SYSTEM-level access from a lower-privileged user account. The vulnerability does not require remote access or network interaction; exploitation demands local access to the machine. No public exploits have been reported in the wild as of the publication date, and no official patches or updates have been linked yet. The affected product, Acronis Cyber Protect Cloud Agent, is widely used for backup, disaster recovery, and endpoint protection in enterprise environments, making this vulnerability significant for organizations relying on this software for critical data protection and system management.

For European organizations, the impact of this vulnerability can be substantial. Successful exploitation allows attackers to gain elevated privileges on systems running the vulnerable Acronis agent, potentially leading to unauthorized access to sensitive data, modification or deletion of backups, and disruption of backup and recovery operations. This can compromise data integrity and availability, critical for business continuity and regulatory compliance, especially under GDPR and other data protection laws. Attackers could also leverage elevated privileges to move laterally within networks, increasing the risk of broader compromise. Given that Acronis Cyber Protect Cloud Agent is commonly deployed in sectors such as finance, healthcare, manufacturing, and government, the vulnerability poses a risk to critical infrastructure and sensitive information across these industries in Europe.

Organizations should implement the following specific mitigations: 1) Immediately verify the build version of Acronis Cyber Protect Cloud Agent deployed and prioritize upgrading to build 39713 or later once available. 2) Until patches are released, restrict local user permissions to prevent unauthorized users from writing to directories or locations where the agent loads binaries, effectively mitigating binary hijacking risks. 3) Employ application whitelisting and integrity verification tools to detect and prevent unauthorized binary modifications or insertions. 4) Monitor systems for unusual local activity indicative of privilege escalation attempts, including unexpected process launches or modifications to agent-related files. 5) Harden endpoint security by limiting local administrative rights and enforcing strict access controls. 6) Coordinate with Acronis support for any interim security advisories or recommended configurations. 7) Incorporate this vulnerability into incident response plans to ensure rapid detection and remediation if exploitation is suspected.