CVE-2026-8398

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-05-27), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 1%CVSS: 9.8Exploit: cisa kev · ssvc activeExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
1%
EPSS %ILE
72%
KEV
⚠ Exploited

Published

May 15, 2026

Last Modified

May 28, 2026

Advisory Details (3)

Auto-updated Sep 16, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8398
generic

Popular DAEMON Tools software compromised | Securelist

https://securelist.com/tr/daemon-tools-backdoor/119654/
generic

Security Incident Affecting DAEMON Tools Lite: What We Know So Far

https://blog.daemon-tools.cc/post/security-incident

Vendor Advisories for CVE-2026-8398(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 59× in last 7d / 246× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 881 total refreshes for this CVE.

  1. 2026-09-19 05:58 UTCGHSA enrichment
  2. 2026-09-19 01:52 UTCGHSA enrichment
  3. 2026-09-18 21:46 UTCEG score recompute
  4. 2026-09-18 21:46 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 19:20 UTCCISA KEV update
  7. 2026-09-18 17:40 UTCGHSA enrichment
  8. 2026-09-18 14:15 UTCCISA KEV update
  9. 2026-09-18 13:34 UTCGHSA enrichment
  10. 2026-09-18 09:28 UTCGHSA enrichment
  11. 2026-09-18 05:22 UTCGHSA enrichment
  12. 2026-09-18 01:16 UTCGHSA enrichment
  13. 2026-09-17 21:10 UTCEG score recompute
  14. 2026-09-17 21:10 UTCGHSA enrichment
  15. 2026-09-17 19:32 UTCEPSS rescore
  16. 2026-09-17 17:03 UTCGHSA enrichment
  17. 2026-09-17 12:53 UTCGHSA enrichment
  18. 2026-09-17 08:45 UTCGHSA enrichment
  19. 2026-09-17 04:38 UTCGHSA enrichment
  20. 2026-09-17 00:32 UTCGHSA enrichment
  21. 2026-09-16 20:25 UTCGHSA enrichment
  22. 2026-09-16 16:16 UTCEG score recompute
  23. 2026-09-16 16:16 UTCGHSA enrichment
  24. 2026-09-16 14:10 UTCCISA KEV update
  25. 2026-09-16 14:09 UTCEPSS rescore
Show 75 more
  1. 2026-09-16 12:08 UTCGHSA enrichment
  2. 2026-09-16 08:01 UTCEG score recompute
  3. 2026-09-16 08:01 UTCGHSA enrichment
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-16 03:54 UTCGHSA enrichment
  6. 2026-09-15 23:47 UTCGHSA enrichment
  7. 2026-09-15 19:40 UTCGHSA enrichment
  8. 2026-09-15 15:34 UTCGHSA enrichment
  9. 2026-09-15 11:27 UTCGHSA enrichment
  10. 2026-09-15 07:21 UTCGHSA enrichment
  11. 2026-09-15 03:14 UTCEG score recompute
  12. 2026-09-15 03:14 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-14 23:08 UTCGHSA enrichment
  15. 2026-09-14 19:24 UTCCISA KEV update
  16. 2026-09-14 19:02 UTCGHSA enrichment
  17. 2026-09-14 14:56 UTCGHSA enrichment
  18. 2026-09-14 10:50 UTCGHSA enrichment
  19. 2026-09-14 06:43 UTCGHSA enrichment
  20. 2026-09-14 02:37 UTCGHSA enrichment
  21. 2026-09-13 22:30 UTCGHSA enrichment
  22. 2026-09-13 18:24 UTCEG score recompute
  23. 2026-09-13 18:24 UTCGHSA enrichment
  24. 2026-09-13 16:48 UTCEPSS rescore
  25. 2026-09-13 14:18 UTCGHSA enrichment
  26. 2026-09-13 10:12 UTCGHSA enrichment
  27. 2026-09-13 06:05 UTCGHSA enrichment
  28. 2026-09-13 01:58 UTCGHSA enrichment
  29. 2026-09-12 21:52 UTCGHSA enrichment
  30. 2026-09-12 17:45 UTCEG score recompute
  31. 2026-09-12 17:45 UTCGHSA enrichment
  32. 2026-09-12 15:02 UTCEPSS rescore
  33. 2026-09-12 13:39 UTCGHSA enrichment
  34. 2026-09-12 09:33 UTCGHSA enrichment
  35. 2026-09-12 05:27 UTCGHSA enrichment
  36. 2026-09-12 01:21 UTCGHSA enrichment
  37. 2026-09-11 21:14 UTCGHSA enrichment
  38. 2026-09-11 18:49 UTCCISA KEV update
  39. 2026-09-11 17:07 UTCEG score recompute
  40. 2026-09-11 17:07 UTCGHSA enrichment
  41. 2026-09-11 14:53 UTCEPSS rescore
  42. 2026-09-11 13:01 UTCEG score recompute
  43. 2026-09-11 13:01 UTCGHSA enrichment
  44. 2026-09-11 08:54 UTCGHSA enrichment
  45. 2026-09-11 04:48 UTCGHSA enrichment
  46. 2026-09-11 00:42 UTCGHSA enrichment
  47. 2026-09-10 20:36 UTCGHSA enrichment
  48. 2026-09-10 19:28 UTCCISA KEV update
  49. 2026-09-10 16:30 UTCGHSA enrichment
  50. 2026-09-10 12:24 UTCEG score recompute
  51. 2026-09-10 12:24 UTCGHSA enrichment
  52. 2026-09-10 08:17 UTCGHSA enrichment
  53. 2026-09-10 04:10 UTCGHSA enrichment
  54. 2026-09-10 00:04 UTCGHSA enrichment
  55. 2026-09-09 19:57 UTCGHSA enrichment
  56. 2026-09-09 19:08 UTCCISA KEV update
  57. 2026-09-09 15:50 UTCGHSA enrichment
  58. 2026-09-09 11:44 UTCGHSA enrichment
  59. 2026-09-09 07:37 UTCGHSA enrichment
  60. 2026-09-09 03:31 UTCGHSA enrichment
  61. 2026-09-08 23:24 UTCEG score recompute
  62. 2026-09-08 23:24 UTCGHSA enrichment
  63. 2026-09-08 22:01 UTCEPSS rescore
  64. 2026-09-08 19:17 UTCGHSA enrichment
  65. 2026-09-08 18:54 UTCCISA KEV update
  66. 2026-09-08 15:08 UTCGHSA enrichment
  67. 2026-09-08 11:01 UTCGHSA enrichment
  68. 2026-09-08 06:56 UTCGHSA enrichment
  69. 2026-09-08 02:48 UTCGHSA enrichment
  70. 2026-09-07 22:42 UTCGHSA enrichment
  71. 2026-09-07 18:35 UTCEG score recompute
  72. 2026-09-07 18:35 UTCGHSA enrichment
  73. 2026-09-07 14:28 UTCGHSA enrichment
  74. 2026-09-07 10:19 UTCGHSA enrichment
  75. 2026-09-07 06:12 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2026-8398?
CVE-2026-8398 is a critical vulnerability published on May 15, 2026. 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…
When was CVE-2026-8398 disclosed?
CVE-2026-8398 was first published in the National Vulnerability Database on May 15, 2026, with the most recent update on May 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8398 actively exploited?
Yes. CISA added CVE-2026-8398 to the Known Exploited Vulnerabilities catalog on May 27, 2026, affecting Daemon Daemon Tools Lite. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-8398?
CVE-2026-8398 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2026-8398?
CVE-2026-8398 affects Daemon Daemon Tools Lite. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-8398?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8398, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-8398

Explore →

Is Your Infrastructure Affected by CVE-2026-8398?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs