CVE-2026-8501

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-01. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

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

Improper access control in the PCTCore64.sys Windows kernel driver from PC Tools Internet Security allows user-mode processes to access the PCTCoreDriver WDM device interface and invoke privileged IOCTL handlers. A local attacker with the ability to access or load the affected driver can exploit this vulnerability to perform sensitive and privileged operations on the target system.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
5.8%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jun 4, 2026
No patch confirmed yet. Sources: cert.
cert

VU#158530 - PCTCore64.sys Windows kernel driver contains missing access control vulnerability

https://www.kb.cert.org/vuls/id/158530
generic

Security Descriptor Definition Language - Win32 apps | Microsoft Learn

https://learn.microsoft.com/en-us/windows/win32/secauthz/security-descriptor-definition-language
generic

Microsoft recommended driver block rules | Microsoft Learn

https://learn.microsoft.com/en-us/windows/security/application-security/application-control/app-control-for-business/design/microsoft-recommended-driver-block-rules
cert

VU#158530 - PCTCore64.sys Windows kernel driver contains missing access control vulnerability

https://kb.cert.org/vuls/id/158530

Vendor Advisories for CVE-2026-8501(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 9× in last 7d / 56× 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 112 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-8501?
CVE-2026-8501 is a high vulnerability published on June 1, 2026. Improper access control in the PCTCore64.sys Windows kernel driver from PC Tools Internet Security allows user-mode processes to access the PCTCoreDriver WDM device interface and invoke privileged IOCTL handlers. A local attacker with the ability to access or load the affected driver can exploit…
When was CVE-2026-8501 disclosed?
CVE-2026-8501 was first published in the National Vulnerability Database on June 1, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8501 actively exploited?
CVE-2026-8501 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8501?
CVE-2026-8501 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-8501?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8501, 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.

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