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CVE-2026-8398

9.8
CRITICALCVSS v3.1 Base Score
15.48%
LOW RiskEPSS (95th percentile)
KEV

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.

Published: 5/15/2026
Modified: 5/28/2026
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Daemon Tools Lite Embedded Malicious Code Vulnerability

Vendor / Product:

Daemon Daemon Tools Lite

Required Action:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Due Date: 5/30/2026(OVERDUE)
Added to KEV:

5/27/2026

Notes:

https://blog.daemon-tools.cc/post/security-incident ; https://nvd.nist.gov/vuln/detail/CVE-2026-8398

Vulnerability Summary

CVSS v3 Score

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score (Exploitation Probability)

15.48%LOW Exploitation Risk
95th percentile

This vulnerability has a 15.48% probability of being exploited in the next 30 days, ranking higher than 95% of all scored CVEs.

CWE Classification

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