{"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"}]}]}}

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