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CVE-2026-8398

Daemon Tools Lite Embedded Malicious Code

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 0.96%
  1. Published15 May 2026
  2. Added to CISA KEV27 May 2026
  3. Remediation due30 May 2026
Actively exploited (CISA KEV)

Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability.

Added to KEV: 27 May 2026Federal remediation due: 30 May 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Disc-soft Daemon Tools12.5.1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-8398 being actively exploited?

Yes. CVE-2026-8398 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 27 May 2026.

How severe is CVE-2026-8398?

CVE-2026-8398 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.96% probability of exploitation.

Which products are affected by CVE-2026-8398?

Affected products include Disc-soft Daemon Tools.

How do I fix CVE-2026-8398?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-8398 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.