CVE-2026-21387

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

Protection mechanism failure for some Intel(R) LLM Library for PyTorch within Ring 3: User Applications may allow an escalation of privilege. Unprivileged software adversary with a privileged user combined with a low complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires passive user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated Aug 11, 2026
No patch confirmed yet.
generic

INTEL-SA-01465

https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01465.html

Vendor Advisories for CVE-2026-21387(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 19× in last 7d / 77× 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 108 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-21387?
CVE-2026-21387 is a medium vulnerability published on August 11, 2026. Protection mechanism failure for some Intel(R) LLM Library for PyTorch within Ring 3: User Applications may allow an escalation of privilege. Unprivileged software adversary with a privileged user combined with a low complexity attack may enable escalation of privilege. This result may potentially…
When was CVE-2026-21387 disclosed?
CVE-2026-21387 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21387 actively exploited?
CVE-2026-21387 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.1% of all scored CVEs.
What is the CVSS score of CVE-2026-21387?
CVE-2026-21387 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-21387?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21387, 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

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