Vulnerability-Lookup

GHSA-RM3R-35X9-JV93

Vulnerability from github – Published: 2026-05-15 09:31 – Updated: 2026-05-15 09:31

Details

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

9.3 (Critical)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-8398"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-506"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-15T09:16:17Z",
    "severity": "CRITICAL"
  },
  "details": "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\u0027s (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.",
  "id": "GHSA-rm3r-35x9-jv93",
  "modified": "2026-05-15T09:31:32Z",
  "published": "2026-05-15T09:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8398"
    },
    {
      "type": "WEB",
      "url": "https://blog.daemon-tools.cc/post/security-incident"
    },
    {
      "type": "WEB",
      "url": "https://securelist.com/tr/daemon-tools-backdoor/119654"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-05-15 07:30 – Updated: 2026-05-28 03:55

Summary

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

Kaspersky

References

2 references

URL	Tags
https://securelist.com/tr/daemon-tools-backdoor/119654/	technical-descriptionthird-party-advisory
https://blog.daemon-tools.cc/post/security-incident	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
AVB Disc Soft	DAEMON Tools Lite	Affected: 12.5.0.2421 , < 2.6.0.* (semver)

Credits

Igor Kuznetsov (Kaspersky) Georgy Kucherin (Kaspersky) Leonid Bezvershenko (Kaspersky) Anton Kargin (Kaspersky)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8398",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-15T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          },
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              "content": {
                "dateAdded": "2026-05-27",
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              },
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            "value": "CVE-2026-8398 added to CISA KEV"
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      }
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    "cna": {
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          "defaultStatus": "unaffected",
          "platforms": [
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          "versions": [
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      "metrics": [
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    "datePublished": "2026-05-15T07:30:29.287Z",
    "dateReserved": "2026-05-12T13:20:16.358Z",
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  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-RM3R-35X9-JV93

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

Tags

Sightings

Nomenclature