{
    "id": "CVE-2026-8398",
    "published": "2026-05-15 09:16:17",
    "last_modified": "2026-06-17 11:03:53",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-506",
    "description": "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.",
    "epss_score": "0.00963",
    "epss_percentile": "0.60126",
    "kev": 1,
    "kev_due": "2026-05-30",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:18:04",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2026-05-30."
    },
    "products": [
        {
            "vendor": "disc-soft",
            "product": "daemon_tools"
        },
        {
            "vendor": "microsoft",
            "product": "windows"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2026-8398",
        "date_added": "2026-05-27",
        "due_date": "2026-05-30",
        "vendor": "Daemon",
        "product": "Daemon Tools Lite",
        "name": "Daemon Tools Lite Embedded Malicious Code Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://blog.daemon-tools.cc/post/security-incident",
        "https://securelist.com/tr/daemon-tools-backdoor/119654/",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"
    ]
}