CVE-2026-1995 is a vulnerability classified under CWE-269 (Improper Privilege Management) affecting the IDrive Cloud Backup Client for Windows. The core issue arises because the id_service.exe process, which runs with SYSTEM-level privileges, reads several UTF16-LE encoded files located in the C:\ProgramData\IDrive\ directory. These files are used as arguments to start other processes. However, these files are writable by any standard user on the system, which violates the principle of least privilege and secure file permissions. An attacker who has local access to the system but only standard user privileges can modify these files to specify a path to an arbitrary executable. When id_service.exe reads these manipulated files, it will launch the specified executable with SYSTEM privileges, effectively allowing privilege escalation from a standard user to SYSTEM. This vulnerability does not require user interaction and can be exploited with low complexity, given local access. The vulnerability has a CVSS v3.1 base score of 7.8, indicating high severity due to its impact on confidentiality, integrity, and availability. No patches or exploit code are currently publicly available, and no known exploits in the wild have been reported. The vulnerability was published on March 24, 2026, and is currently in the published state. The lack of proper access control on configuration files used by a high-privilege service is the root cause, highlighting a failure in secure privilege management and file permission enforcement.

The primary impact of CVE-2026-1995 is local privilege escalation, allowing an attacker with standard user access to gain SYSTEM-level privileges on affected Windows systems running the IDrive Cloud Backup Client. This can lead to full system compromise, including the ability to install persistent malware, disable security controls, access sensitive data, and move laterally within a network. The compromise of backup client software is particularly concerning because it may have access to backup data and system restore functions, potentially enabling attackers to tamper with backups or evade detection. Organizations relying on IDrive Cloud Backup for Windows are at risk of internal threat actors or malware that gains limited access escalating privileges and causing significant damage. The vulnerability affects confidentiality, integrity, and availability of systems and data. Although exploitation requires local access, the ease of exploitation and high privileges gained make this a critical risk in environments where multiple users share systems or where endpoint security is weak.

To mitigate CVE-2026-1995, organizations should immediately review and restrict file permissions on the C:\ProgramData\IDrive\ directory and all files within it to prevent modification by standard users. Specifically, ensure that only SYSTEM and administrators have write access to these files. If possible, disable or uninstall the IDrive Cloud Backup Client on systems where it is not essential. Monitor systems for unexpected process launches by id_service.exe or unusual modifications to the configuration files. Implement application whitelisting to prevent execution of unauthorized binaries by high-privilege processes. Coordinate with IDrive to obtain and apply official patches or updates once available. Consider deploying endpoint detection and response (EDR) solutions to detect suspicious local privilege escalation attempts. Educate users about the risks of local access and enforce strict access controls on shared systems. Additionally, conduct regular audits of file permissions and service configurations to detect similar privilege management issues proactively.