G DATA Total Security GDBackupSvc 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 GDBackupSvc service. By creating a symbolic link, an attacker can abuse the service to create a file with a permissive DACL. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-20694.
Conclusion & alert: CVE-2023-42126 is rated Moderate Risk (42.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.40%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.11% | 0.40% | +0.29% |
| 2 | 2025-11-21 | 0.05% | 0.11% | +0.06% |
| 3 | 2025-11-18 | — | 0.05% | — |
Full EPSS history (6 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 3.0 | HIGH |
|
1.8 | 5.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| gdata-software | total_security | 25.5.14.95 | cpe:2.3:a:gdata-software:total_security:25.5.14.95:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-23-1493/ | Third Party Advisory |