{"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": "2026-05-15T07:30:29.287Z"}, "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"]}]}}}

{}

{"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": "2026-05-15T09:16:17.653", "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", "url": "https://blog.daemon-tools.cc/post/security-incident"}, {"source": "vulnerability@kaspersky.com", "url": "https://securelist.com/tr/daemon-tools-backdoor/119654/"}], "sourceIdentifier": "vulnerability@kaspersky.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-506"}], "source": "vulnerability@kaspersky.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["windows"], "status": "affected", "versions": {"scheme": "generic", "value": "[12.5.0.2421,2.6.0.*)"}}], "enrichment": {"confidence": 83.0, "confidence_source": "matching", "scores": [{"score": 83.0, "source": "matching"}]}, "original": {"product": "DAEMON Tools Lite", "source": "cna", "vendor": "AVB Disc Soft"}, "product": "daemon_tools", "vendor": "disc-soft"}], "created": "2026-05-15T11:15:25.886155+00:00", "title": "Supply Chain Backdoor in DAEMON Tools Lite Installer", "updated": "2026-05-15T11:30:43.691698+00:00", "vendors": ["disc-soft", "disc-soft$PRODUCT$daemon_tools"]}