IDrive for Windows Vulnerability Let Attackers Escalate Privileges

A critical local privilege escalation vulnerability has been identified in the IDrive Cloud Backup Client for Windows.

Tracked as CVE-2026-1995, this local privilege escalation vulnerability affects the IDrive Cloud Backup Client for Windows, specifically targeting versions 7.0.0.63 and earlier.

Security researchers at FRSecure discovered that weak permission configurations within the application’s directory could quickly lead to a complete system compromise.

When successfully exploited, the flaw allows an authenticated attacker to execute malicious code within the highly privileged NT AUTHORITYSYSTEM context.

At the time of disclosure, the vendor was still actively developing an official patch for this security flaw.

IDrive for Windows Vulnerability

The vulnerability is rooted in the operational mechanics of the IDrive Windows client utility, specifically the id_service.exe process. This utility manages cloud backups and runs continuously in the background with highly elevated system privileges.

During normal operations, the service routinely reads from several configuration files stored within the C:ProgramDataIDrive directory. The service uses the UTF-16 LE-encoded contents of these files as direct arguments when launching new processes on the machine.

Because the software applies inherently weak permissions to this directory, any standard user logged into the Windows system can modify these critical files.

An authenticated attacker with low-level privileges can overwrite an existing file or create a new one, inserting a specific file path that points to a malicious script or executable.

When the backup service eventually reads this modified file, it unknowingly executes the attacker’s payload with its own maximum-level permissions.

By exploiting this vulnerability, an attacker can bypass standard Windows security boundaries and instantly escalate their access from a limited user account to a fully privileged administrator account.

Once an attacker successfully gains top-tier access, they establish complete control over the compromised machine.

This access enables threat actors to deploy sophisticated malware, extract highly sensitive data, alter core system configurations, and turn off installed endpoint security solutions.

While the attacker must already have local access to the targeted machine to trigger the exploit, this vulnerability still poses a significant security risk.

It is especially dangerous for shared computing environments or active attack chains where a threat actor has already gained an initial, low-privileged foothold and is looking to elevate their permissions to move laterally across the network.

Mitigations

Until IDrive deploys the official fix, security teams must rely on manual workarounds to secure their enterprise endpoints.

Administrators should follow the CERT Coordination Center guidance and immediately restrict write permissions for all standard users within the affected directory.

Furthermore, organizations are strongly advised to leverage endpoint detection solutions and group policies to monitor for unauthorized file modifications actively.

Security teams should specifically look for suspicious child processes spawned from the main service executable. System administrators should continuously monitor official release channels and apply software updates as soon as they become available.

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