{"cve_id":"CVE-2026-8398","published":"2026-05-15T09:16:17.653000+00:00","last_modified":"2026-10-26T14:10:00.130000+00:00","vuln_status":"Analyzed","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.","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","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-506"],"in_kev":true,"kev_date_added":"2026-05-27","kev_ransomware":false,"epss_score":0.01456,"epss_percentile":0.73498,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-10-28T03:35:10.984776+00:00","first_seen":"2026-05-15T09:16:17.653000+00:00","kev_first_seen":"2026-05-27T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["disc-soft","microsoft"],"products":["daemon_tools","windows"],"affected":[{"vendor":"disc-soft","product":"daemon_tools","ranges":["12.5.1"]}]}