CVE-2026-8398
Confirmed PUBLISHEDA supply chain attack compromised the official installation packages of DAEMON Tools Lite (Windows versions 12.5.0.2421 through 12.5.0.2434),...
6 days faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- May 15, 2026
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 9.3 Critical
- EPSS
- 1.5%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| AVB Disc Soft |
DAEMON Tools Lite
|
12.5.0.2421 to < 2.6.0.* |
Affected |
CVE References
- Security Incident Affecting DAEMON Tools Lite: What We Know So Far blog.daemon-tools.cc · Vendor Advisory https://blog.daemon-tools.cc/post/security-incident
- DAEMON Tools software infected – supply chain attack ongoing since April 8, 2026 securelist.com · Third-Party Advisory https://securelist.com/tr/daemon-tools-backdoor/119654/
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2026-05-27 18:00 UTC |
| CVE | 2026-06-01 10:28 UTC |
| CISA | 2026-06-02 14:00 UTC |
| All CISA Advisories | 2026-06-02 14:21 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:28:16 UTC · CVE
Weaknesses (CWE)
-
Embedded Malicious Code
Recent Mentions
All CISA Advisories · May 27, 2026
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.
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:21 UTC about 2 months ago14:21 UTC · about 2 months ago
KEV confirmed by All CISA Advisories
Exploitation attested by an external source
-
14:00 UTC about 2 months ago14:00 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
10:28 UTC about 2 months ago10:28 UTC · about 2 months ago
KEV confirmed by CVE
Exploitation attested by an external source
-
18:00 UTC about 2 months ago18:00 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
07:30 UTC 2 months ago07:30 UTC · 2 months ago
CVE published
Vulnerability disclosed publicly
-
13:20 UTC 2 months ago13:20 UTC · 2 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-8398
{
"cve_id": "CVE-2026-8398",
"title": "A supply chain attack compromised the official installation packages of DAEMO...",
"affected_vendor": "AVB Disc Soft",
"affected_product": "DAEMON Tools Lite",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.3,
"epss_score": 0.01456,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}