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

Vulnerability from cvelistv5 – Published: 2026-05-15 07:30 – Updated: 2026-05-28 03:55
VLAI CISA Previdian
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
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 00:00 UTC
CWE
  • CWE-506 - Embedded Malicious Code
Assigner
References
Impacted products
Vendor Product Version CPE status
AVB Disc Soft DAEMON Tools Lite Affected: 12.5.0.2421 , < 2.6.0.* (semver)
guessed Create a notification for this product.
Credits
Igor Kuznetsov (Kaspersky) Georgy Kucherin (Kaspersky) Leonid Bezvershenko (Kaspersky) Anton Kargin (Kaspersky)
CISA
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
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 12d3ead8-7852-4708-b0a5-2eb031bea199

Vulnerability ID: CVE-2026-8398

Status: Confirmed

Status Updated: 2026-05-27 18:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-05-27
Asserted: 2026-05-27
Scope
Notes: KEVIntel entry: A supply chain attack compromised the official installation packages of DAEMON Tools Lite (Windows versions 12.5.0.2421 through 12.5.0.2434),... | Affected: AVB Disc Soft / DAEMON Tools Lite | CVSS: 9.3 (CRITICAL) | EPSS: 0.00754 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title A supply chain attack compromised the official installation packages of DAEMON Tools Lite (Windows versions 12.5.0.2421 through 12.5.0.2434),...
Vendor AVB Disc Soft
Product DAEMON Tools Lite
Added Date 2026-05-27T18:00:02.449Z
Cvss Score 9.3
Epss Score 0.00754
Cvss Severity CRITICAL
Epss Percentile 0.50205
Used In Malware unknown
Ahead Of Cisa Kev 
{
  "count": 6,
  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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                  "cweId": "CWE-506",
                  "description": "CWE-506: Embedded Malicious Code",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-15T07:30:29.287Z",
            "orgId": "e45d732a-8f6b-4b6b-be76-7420f6a2b988",
            "shortName": "Kaspersky"
          },
          "references": [
            {
              "name": "DAEMON Tools software infected \u2013 supply chain attack ongoing since April 8, 2026",
              "tags": [
                "technical-description",
                "third-party-advisory"
              ],
              "url": "https://securelist.com/tr/daemon-tools-backdoor/119654/"
            },
            {
              "name": "Security Incident Affecting DAEMON Tools Lite: What We Know So Far",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://blog.daemon-tools.cc/post/security-incident"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "value": "Users of potentially infected application are recommended to uninstall the application, run a full system scan using antivirus software with the latest version of the anti-virus databases, and install the latest version of DAEMON Tools Lite (12.6 or newer) from the official website."
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-05-06T00:00:00.000Z",
              "value": "Advisory published by vendor"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "e45d732a-8f6b-4b6b-be76-7420f6a2b988",
        "assignerShortName": "Kaspersky",
        "cveId": "CVE-2026-8398",
        "datePublished": "2026-05-15T07:30:29.287Z",
        "dateReserved": "2026-05-12T13:20:16.358Z",
        "dateUpdated": "2026-05-28T03:55:20.809Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.