What is CVE-2026-8398?

CVE-2026-8398 is a critical-severity vulnerability in Avb Disc Soft Daemon Tools Lite, classified under CWE-506. CVSS score: 9.8/10. Published 2026-05-15.

How severe is CVE-2026-8398?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2026-8398 known to be exploited?

Yes. CVE-2026-8398 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-05-27), indicating it is being actively exploited.

Vulnerability in Avb Disc Soft Daemon Tools Lite

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…

EPSS: 0.144 (94.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Avb Disc Soft Daemon Tools Lite — versions 12.5.0.2421
Disc-soft Daemon_tools — versions 12.5.1
Microsoft Windows

Weakness classification (CWE)

CWE-506

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2026-05-27. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 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

vulnerability@kaspersky.com (Exploit, technical-description, Third Party Advisory, third-party-advisory)
vulnerability@kaspersky.com (vendor-advisory, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2026-8398?: CVE-2026-8398 is a critical-severity vulnerability in Avb Disc Soft Daemon Tools Lite, classified under CWE-506. CVSS score: 9.8/10. Published 2026-05-15.
How severe is CVE-2026-8398?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-8398 known to be exploited?: Yes. CVE-2026-8398 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-05-27), indicating it is being actively exploited.