CVE-2026-8398 | THREATINT

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.

PUBLISHED Reserved 2026-05-12 | Published 2026-05-15 | Updated 2026-05-16 | Assigner Kaspersky

CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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

Problem types

CWE-506: Embedded Malicious Code

Product status

Default status

unaffected

12.5.0.2421 (semver) before 2.6.0.*

affected

Timeline

2026-05-06:

Advisory published by vendor

Credits

Igor Kuznetsov (Kaspersky) finder

Georgy Kucherin (Kaspersky) finder

Leonid Bezvershenko (Kaspersky) finder

Anton Kargin (Kaspersky) finder

References

securelist.com/tr/daemon-tools-backdoor/119654/ (DAEMON Tools software infected – supply chain attack ongoing since April 8, 2026) technical-description third-party-advisory

blog.daemon-tools.cc/post/security-incident (Security Incident Affecting DAEMON Tools Lite: What We Know So Far) vendor-advisory

cve.org (CVE-2026-8398)

nvd.nist.gov (CVE-2026-8398)

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