---
cve: "CVE-2026-8398"
severity: "CRITICAL"
cvss: 9.3
epss: "1.5%"
vendor: "AVB Disc Soft"
kev: true
exploited: true
published: "2026-05-15 09:16:17"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T09:22:51+02:00"
---

# CVE-2026-8398

> 9.3 CRITICAL · ⚠️ CISA KEV (117 Tage) · 🔓 Exploited

## Beschreibung

A supply chain attack compromised the official installation packages of DAEMON Tools Lite (Windows versions 12.5.0.2421 through 12.5.0.2434), distributed from the legitimate website daemon-tools.cc between approximately April 8, 2026, and May 5, 2026. Attackers gained unauthorized access to the vendor's (AVB Disc Soft) build or distribution infrastructure and trojanized three binaries: DTHelper.exe, DiscSoftBusServiceLite.exe, and DTShellHlp.exe. These files were digitally signed with the legitimate AVB Disc Soft code-signing certificate, allowing the malicious installers to appear trustworthy and bypass signature-based detection.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://securelist.com/tr/daemon-tools-backdoor/119654/>
- <https://blog.daemon-tools.cc/post/security-incident>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-8398) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_