CVE-2026-8398 (GCVE-0-2026-8398)
Vulnerability from cvelistv5 – Published: 2026-05-15 07:30 – Updated: 2026-05-28 03:55Summary
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)
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
3 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 |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AVB Disc Soft | DAEMON Tools Lite |
Affected:
12.5.0.2421 , < 2.6.0.*
(semver)
|
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 2f0673cb-8515-4c71-99c3-b930a82412c5
Exploited: Yes
Timestamps
First Seen: 2026-05-27
Asserted: 2026-05-27
Scope
Notes: 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: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6d076d96-ad8c-4360-a586-6dda4a2112e0
Exploited: Yes
Timestamps
First Seen: 2026-05-27
Asserted: 2026-05-27
Scope
Notes: 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: 0.00963 | Used in malware: unknown | Listed 6 days ahead of CISA KEV | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.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),... |
| Cve Id | CVE-2026-8398 |
| Vendor | AVB Disc Soft |
| Ghsa Id | None |
| Product | DAEMON Tools Lite |
| Added Date | 2026-05-27T18:00:02.449Z |
| Cvss Score | 9.3 |
| Epss Score | 0.00963 |
| Previous Ids | |
| Cvss Severity | CRITICAL |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.60255 |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2026-8398 |
| Ahead Of Cisa Kev |
|
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:10 CEST
| Updated: 2026-10-02 09:10 CEST
{
"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"
}
},
{
"other": {
"content": {
"dateAdded": "2026-05-27",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-28T03:55:20.809Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-27T00:00:00.000Z",
"value": "CVE-2026-8398 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"Windows"
],
"product": "DAEMON Tools Lite",
"vendor": "AVB Disc Soft",
"versions": [
{
"lessThan": "2.6.0.*",
"status": "affected",
"version": "12.5.0.2421",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Igor Kuznetsov (Kaspersky)"
},
{
"lang": "en",
"type": "finder",
"value": "Georgy Kucherin (Kaspersky)"
},
{
"lang": "en",
"type": "finder",
"value": "Leonid Bezvershenko (Kaspersky)"
},
{
"lang": "en",
"type": "finder",
"value": "Anton Kargin (Kaspersky)"
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"cvssV4_0": {
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"vectorString": "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",
"version": "4.0"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"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",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-8398",
"date": "2026-10-01",
"epss": "0.00963",
"percentile": "0.60255"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"platforms": [
"Windows"
],
"product": "DAEMON Tools Lite",
"vendor": "AVB Disc Soft",
"versions": [
{
"lessThan": "2.6.0.*",
"status": "affected",
"version": "12.5.0.2421",
"versionType": "semver"
}
]
}
],
"source": "vulnerability@kaspersky.com"
}
],
"cisaActionDue": "2026-05-30",
"cisaExploitAdd": "2026-05-27",
"cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "Daemon Tools Lite Embedded Malicious Code Vulnerability",
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:disc-soft:daemon_tools:12.5.1:*:*:*:lite:*:*:*",
"matchCriteriaId": "F291E275-397E-40E4-8ABD-292B16A8C90E",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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": "CVE-2026-8398",
"lastModified": "2026-06-17T11:03:53.007",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "vulnerability@kaspersky.com",
"type": "Secondary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "vulnerability@kaspersky.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-8398",
"options": [
{
"exploitation": "active"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-15T00:00:00+00:00",
"version": "2.0.3"
}
}
]
},
"published": "2026-05-15T09:16:17.653",
"references": [
{
"source": "vulnerability@kaspersky.com",
"tags": [
"Vendor Advisory"
],
"url": "https://blog.daemon-tools.cc/post/security-incident"
},
{
"source": "vulnerability@kaspersky.com",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://securelist.com/tr/daemon-tools-backdoor/119654/"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"
}
],
"sourceIdentifier": "vulnerability@kaspersky.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-506"
}
],
"source": "vulnerability@kaspersky.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8398",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-27T17:50:18.985850Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2026-05-27",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-15T13:27:56.721Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-27T00:00:00.000Z",
"value": "CVE-2026-8398 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"Windows"
],
"product": "DAEMON Tools Lite",
"vendor": "AVB Disc Soft",
"versions": [
{
"lessThan": "2.6.0.*",
"status": "affected",
"version": "12.5.0.2421",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Igor Kuznetsov (Kaspersky)"
},
{
"lang": "en",
"type": "finder",
"value": "Georgy Kucherin (Kaspersky)"
},
{
"lang": "en",
"type": "finder",
"value": "Leonid Bezvershenko (Kaspersky)"
},
{
"lang": "en",
"type": "finder",
"value": "Anton Kargin (Kaspersky)"
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"cvssV4_0": {
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"vectorString": "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",
"version": "4.0"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"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"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
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.
Loading…