CVE-2026-8398
Daemon Tools Lite Embedded Malicious Code Vulnerability
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.
Fixes and workarounds
Fix
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.
Source: CNA: KasperskyAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| DAEMON Tools Lite AVB Disc Soft Platforms: Windows |
≥ 12.5.0.2421; < 12.6.0.* (affected, semver)
Other versions: unaffected |
CNA: Kaspersky |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
NVD applicability configurations (1)
These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.
[
{
"negate": false,
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:disc-soft:daemon_tools:12.5.1:*:*:*:lite:*:*:*",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
]CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 9.3 critical |
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 | CNA: Kaspersky |
| 3.1 / 9.8 critical |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA: Kaspersky |
| 4.0 / 9.3 critical |
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 | NVD: [email protected] |
| 3.1 / 9.8 critical |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD: [email protected] |
Exploit evidence
References
- https://securelist.com/tr/daemon-tools-backdoor/119654/CNA: Kaspersky · technical-description, third-party-advisory
- https://blog.daemon-tools.cc/post/security-incidentCNA: Kaspersky · vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398ADP: CISA-ADP · government-resource
- https://blog.daemon-tools.cc/post/security-incident[email protected] · Vendor Advisory
- https://securelist.com/tr/daemon-tools-backdoor/119654/[email protected] · Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398134c704f-9b21-4f2e-91b3-4a467353bcc0 · US Government Resource
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