Critical severity · published May 15, 2026
CVE-2026-8398
Daemon Tools Lite Embedded Malicious Code Vulnerability
In wildKEV
9.8
CVSS
1.5%
EPSS
Yes
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 73% of CVEs
Exploited in the wildYes
CISA KEVListed May 27, 2026
Federal remediation dueMay 30, 2026
Ransomware campaign useNot known
Affected products
Which versions
DT
DAEMON Tools Lite · AVB Disc Soft
12.5.0.2421 before 2.6.0.* · source: vendor, KEV
DT
Daemon Tools · Disc-soft
12.5.1 · source: NVD
In the news
VulnerabilityCritical
U.S. CISA adds Daemon Tools, TanStack, and Nx Console flaws to its Known Exploited Vulnerabilities catalog
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Daemon Tools, TanStack, and Nx Console flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Windows Shell and ConnectWise ScreenConnect flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the catalog: The first flaw, tracked as CVE-2026-8398, […]
May 28, 2026·Security Affairs
VulnerabilityCritical
CISA Adds Three Known Exploited Vulnerabilities to Catalog
CISA has added three new vulnerabilities to its  Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-8398  Daemon Tools Lite Embedded Malicious Code Vulnerability CVE-2026-45321  TanStack Unspecified Vulnerability CVE-2026-48027  Nx Console Embedded Malicious Code Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities  established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the  BOD 22-01 Fact Sheet  for more information. Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of  KEV Catalog vulnerabilities  as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the  specified criteria .
May 27, 2026·CISA Advisories
VulnerabilityHigh
[CISA KEV] CVE-2026-8398: Daemon Daemon Tools Lite - Daemon Tools Lite Embedded Malicious Code Vulnerability
Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability.
DTDaemon Tools LiteCVE-2026-8398
May 27, 2026·CISA KEV