CVE-2026-8398
Last modified
CVE-2026-8398 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 1.44% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Disc-Soft | Daemon Tools | 12.5.1 |
References
- https://blog.daemon-tools.cc/post/security-incidentVendor Advisory
- https://securelist.com/tr/daemon-tools-backdoor/119654/Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-8398?
How severe is CVE-2026-8398?
How do I fix CVE-2026-8398?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-8387A vulnerability in allegroai/clearml versions up to and incl…2.4
- CVE-2026-8388Incorrect boundary conditions in the JavaScript Engine: JIT …6.5
- CVE-2026-8389JIT miscompilation in the JavaScript Engine: JIT component. …8.8
- CVE-2026-8390Use-after-free in the JavaScript: WebAssembly component. Thi…7.3
- CVE-2026-8391Other issue in the JavaScript Engine component. This vulnera…5.3
- CVE-2026-8396Improper restriction of XML external entity reference vulner…7.5
- CVE-2026-8399Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-8400IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSph…9.8
- CVE-2026-8401Sandbox escape in the Profile Backup component. This vulnera…9.8
- CVE-2026-8402Improper neutralization of special elements used in an SQL c…9.8
- CVE-2026-8403Improper neutralization of input during web page generation …6.1
- CVE-2026-8404An issue was discovered in Django 5.2 before 5.2.15 and 6.0 …5.3
Are you affected by CVE-2026-8398?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST