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CVE-2026-8398

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 legiti
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:49709f458e6c74882380dc445c5a811ca37fad24348d199991a747f3bf3baa99
Known exploited
CISA KEV
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"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","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["Windows"],"product":"DAEMON Tools Lite","vendor":"AVB Disc Soft","versions":[{"lessThan":"2.6.0.*","status":"affected","version":"12.5.0.2421","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"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","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-506","description":"CWE-506: Embedded Malicious Code","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-506"],"dateAdded":"2026-05-27","dueDate":"2026-05-30","knownRansomwareCampaignUse":"Unknown","notes":"https://blog.daemon-tools.cc/post/security-incident ; https://nvd.nist.gov/vuln/detail/CVE-2026-8398","product":"Daemon Tools Lite","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability.","vendorProject":"Daemon…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:c4e8b3ad9554496a7d2c40bedb5222c91ee0b101fa86df622e7ce1994f30a312 · sha256:635dff916c4092c0… · /vulnerabilities/56
    Open source location →
{"cwes":["CWE-506"],"dateAdded":"2026-05-27","dueDate":"2026-05-30","knownRansomwareCampaignUse":"Unknown","notes":"https://blog.daemon-tools.cc/post/security-incident ; https://nvd.nist.gov/vuln/detail/CVE-2026-8398","product":"Daemon Tools Lite","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"Daemon Tools contains an unspecified vulnerability that has a high impact on confidentiality, integrity, and availability.","vendorProject":"Daemon…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:efd16715fb01bae0ce5707178822413a40096c2c381446558c8e2ded38595c4e · sha256:16acee8334e59e44… · /vulnerabilities/53
    Open source location →

Source references

3 source assertions
{"name":"Security Incident Affecting DAEMON Tools Lite: What We Know So Far","tags":["vendor-advisory"],"url":"https://blog.daemon-tools.cc/post/security-incident"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/references/1
{"name":"DAEMON Tools software infected – supply chain attack ongoing since April 8, 2026","tags":["technical-description","third-party-advisory"],"url":"https://securelist.com/tr/daemon-tools-backdoor/119654/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/cna/references/0
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d9a4df6c6df835eb0b878fab343c476dd298ad8caef29783ff2354e5ffd5c75 · sha256:4fd04c01d013457d… · /containers/adp/0/references/0

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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