Vulnerability details
CVE-2026-8398
Actively exploited
AVB Disc Soft DAEMON Tools Lite
CVSS 4.0
9.3Critical
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (Kaspersky) | 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 |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (Kaspersky) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| AVB Disc Soft | DAEMON Tools Lite | 12.5.0.2421 ≤ v < 2.6.0.* | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://securelist.com/tr/daemon-tools-backdoor/119654/ technical-descriptionthird-party-advisory
- https://blog.daemon-tools.cc/post/security-incident vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398 government-resource
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Details
- Published
- 2026-05-15
- Last updated
- 2026-05-28
- State
- Published
- Assigner (CNA)
- Kaspersky
- Kolun priority
- 72 · High
CISA KEV catalog
- Date added
- 2026-05-27
- Due date
- 2026-05-30
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
1.45%
Probability of exploitation in 30 days
73.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-506Embedded Malicious Code