CVE-2026-8398 KEV
9.8
CRITICAL · CVSS 3.1 · EPSS 1% (pctl 60)
Patch first
On CISA KEV — known exploited in the wild, due 2026-05-30.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 0.96% — more likely to be exploited than 60% of all CVEs |
| Weakness | CWE-506 |
| On CISA KEV | yes — remediate by 2026-05-30 |
| Public exploit | none known |
| Published | 2026-05-15 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Daemon Tools Lite Embedded Malicious Code Vulnerability |
|---|---|
| Added | 2026-05-27 |
| Due | 2026-05-30 |
| Vendor / product | Daemon / Daemon Tools Lite |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| disc-soft | daemon tools |
| microsoft | windows |
References
→ the Explorer · watch your stack · NVD