{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8398", "assignerOrgId": "e45d732a-8f6b-4b6b-be76-7420f6a2b988", "state": "PUBLISHED", "assignerShortName": "Kaspersky", "dateReserved": "2026-05-12T13:20:16.358Z", "datePublished": "2026-05-15T07:30:29.287Z", "dateUpdated": "2026-05-28T03:55:20.809Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "e45d732a-8f6b-4b6b-be76-7420f6a2b988", "shortName": "Kaspersky", "dateUpdated": "2026-05-15T07:30:29.287Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-506", "description": "CWE-506: Embedded Malicious Code", "type": "CWE"}]}], "affected": [{"vendor": "AVB Disc Soft", "product": "DAEMON Tools Lite", "platforms": ["Windows"], "versions": [{"version": "12.5.0.2421", "versionType": "semver", "lessThan": "2.6.0.*", "status": "affected"}], "defaultStatus": "unaffected"}], "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'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."}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "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"}, "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "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": [{"time": "2026-05-06T00:00:00.000Z", "lang": "en", "value": "Advisory published by vendor"}], "credits": [{"lang": "en", "value": "Igor Kuznetsov (Kaspersky)", "type": "finder"}, {"lang": "en", "value": "Georgy Kucherin (Kaspersky)", "type": "finder"}, {"lang": "en", "value": "Leonid Bezvershenko (Kaspersky)", "type": "finder"}, {"lang": "en", "value": "Anton Kargin (Kaspersky)", "type": "finder"}], "references": [{"url": "https://securelist.com/tr/daemon-tools-backdoor/119654/", "name": "DAEMON Tools software infected \u2013 supply chain attack ongoing since April 8, 2026", "tags": ["technical-description", "third-party-advisory"]}, {"url": "https://blog.daemon-tools.cc/post/security-incident", "name": "Security Incident Affecting DAEMON Tools Lite: What We Know So Far", "tags": ["vendor-advisory"]}]}, "adp": [{"references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398", "tags": ["government-resource"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-15T00:00:00+00:00", "options": [{"Exploitation": "active"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-8398"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2026-05-27", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T03:55:20.809Z"}, "timeline": [{"time": "2026-05-27T00:00:00.000Z", "lang": "en", "value": "CVE-2026-8398 added to CISA KEV"}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-8398", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-05-27T17:50:18.985850Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2026-05-27", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"}}}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398", "tags": ["government-resource"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-15T13:27:56.721Z"}, "timeline": [{"lang": "en", "time": "2026-05-27T00:00:00.000Z", "value": "CVE-2026-8398 added to CISA KEV"}]}], "cna": {"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)"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "cvssV4_0": {"version": "4.0", "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"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "AVB Disc Soft", "product": "DAEMON Tools Lite", "versions": [{"status": "affected", "version": "12.5.0.2421", "lessThan": "2.6.0.*", "versionType": "semver"}], "platforms": ["Windows"], "defaultStatus": "unaffected"}], "timeline": [{"lang": "en", "time": "2026-05-06T00:00:00.000Z", "value": "Advisory published by vendor"}], "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."}], "references": [{"url": "https://securelist.com/tr/daemon-tools-backdoor/119654/", "name": "DAEMON Tools software infected \u2013 supply chain attack ongoing since April 8, 2026", "tags": ["technical-description", "third-party-advisory"]}, {"url": "https://blog.daemon-tools.cc/post/security-incident", "name": "Security Incident Affecting DAEMON Tools Lite: What We Know So Far", "tags": ["vendor-advisory"]}], "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'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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-506", "description": "CWE-506: Embedded Malicious Code"}]}], "providerMetadata": {"orgId": "e45d732a-8f6b-4b6b-be76-7420f6a2b988", "shortName": "Kaspersky", "dateUpdated": "2026-05-15T07:30:29.287Z"}}}, "cveMetadata": {"cveId": "CVE-2026-8398", "state": "PUBLISHED", "dateUpdated": "2026-05-28T03:55:20.809Z", "dateReserved": "2026-05-12T13:20:16.358Z", "assignerOrgId": "e45d732a-8f6b-4b6b-be76-7420f6a2b988", "datePublished": "2026-05-15T07:30:29.287Z", "assignerShortName": "Kaspersky"}, "dataVersion": "5.2"}

{"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'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."}], "id": "CVE-2026-8398", "lastModified": "2026-05-28T12:57:00.563", "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"}]}, "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"}]}

{}