CVE-2025-7779 is a local privilege escalation vulnerability classified under CWE-269 (Improper Privilege Management) found in Acronis True Image products running on macOS. The root cause is an insecure configuration of an XPC (Cross Process Communication) service, which is a macOS interprocess communication mechanism. This misconfiguration allows a local attacker, who already has limited user privileges, to exploit the service to gain elevated privileges, potentially root-level access. The vulnerability affects multiple variants of Acronis True Image for macOS, including the standard edition and OEM versions for SanDisk and Western Digital, specifically versions before builds 42389, 42198, and 42197 respectively. The CVSS v3.0 score is 8.8, indicating a high severity with attack vector local, low attack complexity, requiring low privileges, no user interaction, and scope change, impacting confidentiality, integrity, and availability. Although no public exploits or patches have been reported yet, the vulnerability poses a significant risk due to the elevated privileges that can be gained, which could allow attackers to manipulate backup data, disable security controls, or persist on affected systems. The vulnerability was publicly disclosed on September 30, 2025, with the vendor Acronis assigned as the source. Given the nature of backup software, exploitation could compromise critical data protection mechanisms.

The impact of CVE-2025-7779 is substantial for organizations using Acronis True Image on macOS. Successful exploitation allows a local attacker to escalate privileges, potentially gaining root access. This can lead to unauthorized access to sensitive backup data, modification or deletion of backups, and disruption of backup and recovery operations. The compromise of backup software undermines an organization's ability to recover from ransomware or data loss incidents, increasing the risk of prolonged downtime and data breaches. Additionally, elevated privileges can be leveraged to disable security mechanisms, install persistent malware, or move laterally within the network. Organizations relying on Acronis True Image for critical data protection are at risk of significant confidentiality, integrity, and availability losses. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after disclosure. The vulnerability's local attack vector means that attackers need initial access, but this could be achieved through other means such as phishing or physical access, making it a critical concern in environments with multiple users or shared systems.

To mitigate CVE-2025-7779, organizations should first monitor for updates and patches from Acronis and apply them promptly once available. Until patches are released, restrict local user access on macOS systems running affected Acronis True Image versions to trusted personnel only. Implement strict access controls and limit the number of users with local login capabilities. Employ endpoint detection and response (EDR) solutions to monitor for suspicious privilege escalation attempts or unusual XPC service interactions. Consider temporarily disabling or uninstalling Acronis True Image on macOS systems where feasible, especially on high-risk endpoints. Conduct regular audits of local user accounts and permissions to minimize the attack surface. Additionally, use macOS security features such as System Integrity Protection (SIP) and ensure that all software is running with the least privileges necessary. Network segmentation can also help contain potential compromises. Finally, educate users about the risks of local access and enforce strong authentication policies to reduce the likelihood of initial compromise.