CVE-2026-21400

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% (4th percentile of EPSS-scored CVEs). 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: 0.2%CVSS: 5.4Exploit: None knownExposed services: Not assessed

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

Protection mechanism failure for some Intel(R) AI Reference Models before version v3.4.1 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
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

August 12, 2026

Advisory Details (1)

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

INTEL-SA-01432

https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01432.html

Vendor Advisories for CVE-2026-21400(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 10× in last 7d / 62× 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 132 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-21400?
CVE-2026-21400 is a medium vulnerability published on August 11, 2026. Protection mechanism failure for some Intel(R) AI Reference Models before version v3.4.1 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…
When was CVE-2026-21400 disclosed?
CVE-2026-21400 was first published 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-2026-21400 actively exploited?
CVE-2026-21400 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-21400?
CVE-2026-21400 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-21400?
No fix for CVE-2026-21400 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-21400 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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