ZDI-CAN-28665: ZDI-26-432: 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.
Other sources
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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-13268.
— ZDI
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
G DATA Total Security Backup Serviceto a version that resolves this vulnerability.Patch ZDI-26-432 - Compensating control
Mitigate exploitation of the Backup Service by restricting low-privileged users’ ability to create symbolic links on the target (e.g., use OS/file-system protections and policies that prevent unprivileged symlink creation in locations used by the Backup Service).
- Operational
After applying the vendor/ZDI fix, review for any files that may have been deleted via symlink abuse and restore them if necessary.
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-28665?
The severity of ZDI-CAN-28665 is high with a score of 7.8.
How do I fix ZDI-CAN-28665?
To fix ZDI-CAN-28665, ensure that G DATA Total Security is updated to the latest version provided by the vendor.
What type of attackers can exploit ZDI-CAN-28665?
ZDI-CAN-28665 can be exploited by local attackers who have the ability to execute low-privileged code.
What software is affected by ZDI-CAN-28665?
ZDI-CAN-28665 affects G DATA Total Security installations.
What impacts does ZDI-CAN-28665 have on affected systems?
ZDI-CAN-28665 allows attackers to escalate privileges, potentially leading to unauthorized access or control over the system.