CVE-2026-12786Public exploit

Local privilege escalation via unchecked raw disk access

Published Jun 21, 2026 · Updated Jun 21, 2026

Improper access control in UltraISO Premium Edition 9.76 and earlier allows local users to read or write protected disk data. The bootpt64.sys driver grants Builtin Users access to \.\BootPart, accepts a caller-selected disk through IOCTL 0x7F300, and opens it from kernel context without forcing an access check. Standard-user access is sufficient to bypass file and raw-disk permissions, exposing protected contents and enabling tampering that supports local privilege escalation.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in UltraISO Premium Edition 9.76 and earlier allows local users to read or write protected disk data. The bootpt64.sys driver grants Builtin Users access to \.\BootPart, accepts a caller-selected disk through IOCTL 0x7F300, and opens it from kernel context without forcing an access check. Standard-user access is sufficient to bypass file and raw-disk permissions, exposing protected contents and enabling tampering that supports local privilege escalation.

The record

CVE
CVE-2026-12786
Published
Jun 21, 2026
Updated
Jun 21, 2026
Vendor
EZB Systems, Inc.
Product
UltraISO Premium Edition
Classifications
CWE-266, CWE-284, T1006, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0
  2. Affected versionversion=9.1
  3. Affected versionversion=9.10
  4. Affected versionversion=9.11
  5. Affected versionversion=9.12
  6. Affected versionversion=9.13
  7. Affected versionversion=9.14
  8. Affected versionversion=9.15
  9. Affected versionversion=9.16
  10. Affected versionversion=9.17
  11. Affected versionversion=9.18
  12. Affected versionversion=9.19
  13. Affected versionversion=9.2
  14. Affected versionversion=9.20
  15. Affected versionversion=9.21
  16. Affected versionversion=9.22
  17. Affected versionversion=9.23
  18. Affected versionversion=9.24
  19. Affected versionversion=9.25
  20. Affected versionversion=9.26
  21. Affected versionversion=9.27
  22. Affected versionversion=9.28
  23. Affected versionversion=9.29
  24. Affected versionversion=9.3
  25. Affected versionversion=9.30
  26. Affected versionversion=9.31
  27. Affected versionversion=9.32
  28. Affected versionversion=9.33
  29. Affected versionversion=9.34
  30. Affected versionversion=9.35
  31. Affected versionversion=9.36
  32. Affected versionversion=9.37
  33. Affected versionversion=9.38
  34. Affected versionversion=9.39
  35. Affected versionversion=9.4
  36. Affected versionversion=9.40
  37. Affected versionversion=9.41
  38. Affected versionversion=9.42
  39. Affected versionversion=9.43
  40. Affected versionversion=9.44
  41. Affected versionversion=9.45
  42. Affected versionversion=9.46
  43. Affected versionversion=9.47
  44. Affected versionversion=9.48
  45. Affected versionversion=9.49
  46. Affected versionversion=9.5
  47. Affected versionversion=9.50
  48. Affected versionversion=9.51
  49. Affected versionversion=9.52
  50. Affected versionversion=9.53
  51. Affected versionversion=9.54
  52. Affected versionversion=9.55
  53. Affected versionversion=9.56
  54. Affected versionversion=9.57
  55. Affected versionversion=9.58
  56. Affected versionversion=9.59
  57. Affected versionversion=9.6
  58. Affected versionversion=9.60
  59. Affected versionversion=9.61
  60. Affected versionversion=9.62
  61. Affected versionversion=9.63
  62. Affected versionversion=9.64
  63. Affected versionversion=9.65
  64. Affected versionversion=9.66
  65. Affected versionversion=9.67
  66. Affected versionversion=9.68
  67. Affected versionversion=9.69
  68. Affected versionversion=9.7
  69. Affected versionversion=9.70
  70. Affected versionversion=9.71
  71. Affected versionversion=9.72
  72. Affected versionversion=9.73
  73. Affected versionversion=9.74
  74. Affected versionversion=9.75
  75. Affected versionversion=9.76
  76. Affected versionversion=9.8
  77. Affected versionversion=9.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

EZB Systems, Inc. · UltraISO Premium Editionversion=9.0; version=9.1; version=9.10; version=9.11; version=9.12; version=9.13; version=9.14; version=9.15; version=9.16; version=9.17; version=9.18; version=9.19; version=9.2; version=9.20; version=9.21; version=9.22; version=9.23; version=9.24; version=9.25; version=9.26; version=9.27; version=9.28; version=9.29; version=9.3; version=9.30; version=9.31; version=9.32; version=9.33; version=9.34; version=9.35; version=9.36; version=9.37; version=9.38; version=9.39; version=9.4; version=9.40; version=9.41; version=9.42; version=9.43; version=9.44; version=9.45; version=9.46; version=9.47; version=9.48; version=9.49; version=9.5; version=9.50; version=9.51; version=9.52; version=9.53; version=9.54; version=9.55; version=9.56; version=9.57; version=9.58; version=9.59; version=9.6; version=9.60; version=9.61; version=9.62; version=9.63; version=9.64; version=9.65; version=9.66; version=9.67; version=9.68; version=9.69; version=9.7; version=9.70; version=9.71; version=9.72; version=9.73; version=9.74; version=9.75; version=9.76; version=9.8; version=9.9

Published CVSS scores

7.1VulDB CNACVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
7.8VulDB CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.8VulDB CNAAV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
CWE-284Improper Access Control
T1006Direct Volume Access
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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