Critical 9.8Known exploited (CISA KEV)Published May 15, 2026

CVE-2026-8398A 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 b…

Updated under an hour ago (2026-10-19 05:50 UTC)

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It affects AVB Disc Soft DAEMON Tools Lite and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since May 27, 2026; federal agencies had to remediate by May 30, 2026. Treat that date as your deadline.

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Every CVE for AVB Disc Soft DAEMON Tools Lite

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-506
Known exploited: Added to CISA KEV May 27, 2026; federal remediation due May 30, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 0.96% (percentile 61)
Assigned by: Kaspersky
NVD analysis: Analyzed
Record last updated: May 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

AVB Disc Soft DAEMON Tools Lite avb_disc_soft:daemon_tools_lite (from the name)	12.5.0.2421 builds before 2.6.0.*	CNA record
disc-soft daemon_tools disc-soft:daemon_tools	12.5.1	NVD

References

https://securelist.com/tr/daemon-tools-backdoor/119654/technical-description, third-party-advisory, exploit
https://blog.daemon-tools.cc/post/security-incidentvendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.