CVE-2026-8398

CRITICAL9.8

CISA KEV

Published 2026-05-15 · Updated 2026-10-26 · Source vulnerability@kaspersky.com

Summary

CVE-2026-8398 is a critical-severity (CVSS 9.8) vulnerability in Daemon Daemon Tools Lite. CISA added it to the Known Exploited Vulnerabilities catalog on May 27, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 30, 2026. CISA does not currently list it as used in ransomware campaigns.

All 1 known-exploited Daemon vulnerabilities →

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.

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

CWE-506

CISA Known-Exploited Vulnerability

Product: Daemon — Daemon Tools Lite

Name: Daemon Tools Lite Embedded Malicious Code Vulnerability

Date added: 2026-05-27 · Due: 2026-05-30

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.

References

View on NVD

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