CVE-2026-8398 (GCVE-0-2026-8398)

Vulnerability from cvelistv5 – Published: 2026-05-15 07:30 – Updated: 2026-05-27 19:58
VLAI CISA KEV
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-506 - Embedded Malicious Code
Assigner
References
Impacted products
Vendor Product Version
AVB Disc Soft DAEMON Tools Lite Affected: 12.5.0.2421 , < 2.6.0.* (semver)
Create a notification for this product.
Credits
Igor Kuznetsov (Kaspersky) Georgy Kucherin (Kaspersky) Leonid Bezvershenko (Kaspersky) Anton Kargin (Kaspersky)
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 11739434-0930-4569-82cd-80d659d1039f

Vulnerability ID: CVE-2026-8398

Status: Confirmed

Status Updated: 2026-05-27 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-05-27
Asserted: 2026-05-27
Scope
Notes: KEV entry: Daemon Tools Lite Embedded Malicious Code Vulnerability | Affected: Daemon / Daemon Tools Lite | Description: Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability. | 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. | Due date: 2026-05-30 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://blog.daemon-tools.cc/post/security-incident ; https://nvd.nist.gov/vuln/detail/CVE-2026-8398
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-506
Feed CISA Known Exploited Vulnerabilities Catalog
Product Daemon Tools Lite
Due Date 2026-05-30
Date Added 2026-05-27
Vendorproject Daemon
Vulnerabilityname Daemon Tools Lite Embedded Malicious Code Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-05-27 18:00 UTC | Updated: 2026-05-27 18:00 UTC
Show details on NVD website
To clipboard 

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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.