CVEs / CVE-2026-8398
CVE-2026-8398: Daemon Tools Lite Embedded Malicious Code Vulnerability
- Known exploited in the CISA KEV catalog since 27 May 2026
- critical 9.3 CVSS 4.0 (from the CNA)
- EPSS 1.45% chance of exploitation in the next 30 days, higher than 73% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| AVB Disc Soft DAEMON Tools Lite | from 12.5.0.2421, before 2.6.0.* | 2.6.0.* |
Exploitation
| In CISA KEV since | 27 May 2026 |
|---|---|
| Due date for US federal agencies | 30 May 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 4.0 | 9.3 criticalCVSS: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:XScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-506 |
References
- CVE-2026-8398 on NVD
- CVE-2026-8398 in the CISA KEV catalog
- https://blog.daemon-tools.cc/post/security-incident (cited by CISA)
- https://blog.daemon-tools.cc/post/security-incident Vendor Advisory
- https://securelist.com/tr/daemon-tools-backdoor/119654/ Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.