CVE-2026-8398

CriticalCVSS 9.8/10Known exploited (CISA KEV)Last modified Nov 11, 2026

Description

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-506

Affected software

VendorProductVersions
AVB Disc SoftDAEMON Tools Lite>= 12.5.0.2421, < 2.6.0.*

References

Timeline

Published
May 15, 2026
Last modified
Nov 11, 2026
Added to CISA KEV
May 27, 2026
NVD status
Analyzed

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CVE-2026-8398: Critical severity, CVSS 9.8 | Vulnix