CVE-2026-8398
CRITICAL KEV CISA Exploitation: ACTIVE
9.8
CVSS 3.1
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.
Metadata
Severity & Metrics
9.8
CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
CISA Known Exploited Vulnerability
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.
CISA description
Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability.
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| AVB Disc Soft | DAEMON Tools Lite | Windows | 12.5.0.2421 < 2.6.0.* |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-506 | cna | CWE-506: Embedded Malicious Code |
CVSS scores (2)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 9.8 | CRITICAL | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 9.3 | CRITICAL | 4.0 | cna | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
References (2)
- DAEMON Tools software infected – supply chain attack ongoing since April 8, 2026 https://securelist.com/tr/daemon-tools-backdoor/119654/
- Security Incident Affecting DAEMON Tools Lite: What We Know So Far https://blog.daemon-tools.cc/post/security-incident