CVE-2026-8398

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 4.0

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

CVSS 3.1

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

EPSS

1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-25)

CISA KEV

listed 2026-05-27, due 2026-05-30

CWE

CWE-506

Published

2026-05-15

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• disc-soft:daemon_tools

References

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

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