Which products and versions are affected by CVE-2026-8398?

Affected: Daemon Tools (Disc-Soft) versions 12.5.1; DAEMON Tools Lite versions >= 12.5.0.2421. The full list is in the CVE brief.

Is CVE-2026-8398 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 8, 2026.

Is CVE-2026-8398 in the CISA KEV catalog?

Yes. It was added on May 27, 2026 with a federal remediation due date of May 30, 2026.

Is there a public exploit for CVE-2026-8398?

Public exploit code is available.

Is there a fix for CVE-2026-8398?

Fixed versions are available, including DAEMON Tools Lite 2.6.0.*.

How urgently should CVE-2026-8398 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2026-8398

CriticalExploitedPublic exploit

Published May 15, 2026 · Updated May 28, 2026 · Also known as EUVD-2026-30514, GHSA-rm3r-35x9-jv93

Key Facts

Patch immediately

CVE-2026-8398 is a critical-severity vulnerability (CVSS 9.3 v4) affecting Daemon Tools (Disc-Soft), DAEMON Tools Lite.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 8, 2026. Public exploit code is available.
EPSS estimates a 1.0% probability of exploitation in the next 30 days.
Fixed versions are available, including DAEMON Tools Lite 2.6.0.*.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

9.3

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (30-day exploit likelihood)

1.0%

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2026-8398 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	May 27, 2026	May 30, 2026	Not reported
Industry KEV feed	May 8, 2026	May 30, 2026	Not reported
CIRCL KEV	May 27, 2026	May 30, 2026	Not reported
ENISA EUVD	May 27, 2026	n/a	Not reported

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.

Affected Products

3 affected entries in total

Product	Affected versions	Fixed in
Daemon ToolsDisc-Soft	12.5.1	n/a
DAEMON Tools Lite	>= 12.5.0.2421	2.6.0.*

Patched Releases

DAEMON Tools Lite

2.6.0.*

Timeline

Added to Industry KEV feed
May 8, 2026
Publicly disclosed
May 15, 2026
Added to CISA KEV
May 27, 2026
Added to CIRCL KEV
May 27, 2026
Added to ENISA EUVD
May 27, 2026
Last updated
May 28, 2026

Weakness Type

CWE-506 Embedded Malicious Code

References

FAQ

Common Questions.

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.
Affected: Daemon Tools (Disc-Soft) versions 12.5.1; DAEMON Tools Lite versions >= 12.5.0.2421. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 8, 2026.
Yes. It was added on May 27, 2026 with a federal remediation due date of May 30, 2026.
Public exploit code is available.
Fixed versions are available, including DAEMON Tools Lite 2.6.0.*.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2026-8398 Running On Your Attack Surface?

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