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Vulnerabilities / CVE-2026-8398

CVE-2026-8398

Published 2026-05-15 · published (not yet in NVD)

CVE-2026-8398

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-05-27, with a fix-by date of 2026-05-30. Patch it first.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

9.3 CRITICAL
CVSS 4.0 · CNA
1.5%
chance of exploitation in the next 30 days (EPSS; higher than 73% of CVEs)

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.

Scores

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCNA
9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCNA

Affected products

  • AVB Disc Soft DAEMON Tools Lite: 12.5.0.2421 to < 2.6.0.*

Weakness: CWE-506

2 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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