CVE-2026-8398

CRITICAL 9.8

⚠️ CISA KEV

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

12th

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.

CWE	CWE-506
Vendor	avb disc soft
Product	daemon tools lite
Published	May 15, 2026
Last Updated	May 28, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

AVB Disc Soft / DAEMON Tools Lite

12.5.0.2421 < 2.6.0.*

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Igor Kuznetsov (Kaspersky) Georgy Kucherin (Kaspersky) Leonid Bezvershenko (Kaspersky) Anton Kargin (Kaspersky)