CVE-2026-13268 in Total Security
Summary
by MITRE • 07/29/2026
G DATA Total Security Backup Service Link Following Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of G DATA Total Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the Backup Service. By creating a symbolic link, an attacker can abuse the service to delete a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-28665.
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Analysis
by VulDB Data Team • 07/29/2026
This vulnerability represents a critical local privilege escalation flaw within G DATA Total Security's Backup Service component, specifically targeting the Windows operating system environment. The issue stems from improper handling of symbolic links within the backup service functionality, creating an exploitable condition that allows attackers to manipulate file operations in ways that bypass normal security controls. The vulnerability was identified as ZDI-CAN-28665 and demonstrates a classic path traversal or symlink manipulation attack vector that has been documented in numerous security advisories across different vendors. The flaw exists at the service level where backup operations are executed with elevated privileges, creating a dangerous privilege separation issue. According to CWE classification, this vulnerability maps to CWE-59, which describes improper handling of symbolic links, and CWE-269, concerning improper privilege management. The attack scenario requires initial compromise at a low-privileged user level, making it particularly concerning as it provides a clear escalation path from user-level access to SYSTEM-level control.
The technical implementation of this vulnerability involves the backup service's failure to properly validate or sanitize symbolic link references during file operations. When an attacker creates a carefully crafted symbolic link within the backup service context, they can manipulate the service to delete files that would normally be protected or inaccessible. This occurs because the backup service operates with elevated privileges and processes symbolic links without adequate verification of their target paths. The service's inability to distinguish between legitimate file operations and malicious symlink manipulation creates the privilege escalation opportunity. Attackers can leverage this by placing malicious symlinks in strategic locations within the backup service's operational environment, allowing them to delete or overwrite critical system files with elevated permissions. This type of vulnerability is particularly dangerous because it operates at the kernel or service level where normal user-space protections are bypassed.
The operational impact of this vulnerability extends far beyond simple privilege escalation, as it provides attackers with complete system compromise capabilities. Once an attacker achieves SYSTEM-level execution through this vulnerability, they can manipulate any file on the system, modify security settings, install malicious software, and establish persistent access. The backup service's elevated privileges create a perfect attack vector for lateral movement within a network, as attackers can use this privilege escalation to target other systems or escalate further into domain controller access. This vulnerability aligns with ATT&CK technique T1068, which covers local privilege escalation through service exploitation, and T1543, covering creating or modifying system processes. The impact is particularly severe in enterprise environments where G DATA Total Security is deployed, as it can serve as a gateway for attackers to move laterally through the network infrastructure.
Mitigation strategies for this vulnerability should include immediate patch application from G DATA, as well as implementing restrictive file system permissions that prevent unauthorized symlink creation in service directories. System administrators should disable unnecessary backup services or implement strict access controls over backup operation directories. Network segmentation and monitoring of backup service activities can help detect exploitation attempts by identifying unusual file deletion patterns. The implementation of privilege separation techniques and mandatory access controls can further reduce the attack surface, while regular security audits should verify that no malicious symlinks exist in system directories. Additionally, endpoint detection and response solutions should be configured to monitor for suspicious symbolic link creation patterns and file operation anomalies that could indicate exploitation attempts. Organizations should also consider implementing application whitelisting policies that restrict which processes can execute backup-related operations, thereby reducing the attack surface available to potential exploiters.