CVE-2026-21046

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 99% 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 — 4 sources updated this week
8.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.4Exploit: NoneExposed: 0

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

Time-of-check time-of-use race condition in fabricKeymaster trustlet prior to SMR Jul-2026 Release 1 allows local privileged attackers to execute arbitrary code.

CVSS v3
8.4
EG Score
8.4(medium)
EPSS
0.9%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 11, 2026

Advisory Details (1)

Auto-updated Jul 10, 2026
No patch confirmed yet.
generic

Samsung Mobile Security

https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=07

Vendor Advisories for CVE-2026-21046(1)

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

Data Freshness Timeline

(refreshed 34× in last 7d / 34× 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.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 15:40 UTCEG score recompute
  4. 2026-07-15 15:40 UTCGHSA enrichment
  5. 2026-07-15 04:48 UTCEG score recompute
  6. 2026-07-15 04:48 UTCGHSA enrichment
  7. 2026-07-14 17:58 UTCEG score recompute
  8. 2026-07-14 17:58 UTCGHSA enrichment
  9. 2026-07-14 06:52 UTCEG score recompute
  10. 2026-07-14 06:52 UTCGHSA enrichment
  11. 2026-07-13 22:30 UTCEPSS rescore
  12. 2026-07-13 20:00 UTCEG score recompute
  13. 2026-07-13 20:00 UTCGHSA enrichment
  14. 2026-07-13 09:09 UTCEG score recompute
  15. 2026-07-13 09:09 UTCGHSA enrichment
  16. 2026-07-13 06:13 UTCEPSS rescore
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-12 22:18 UTCEG score recompute
  19. 2026-07-12 22:18 UTCGHSA enrichment
  20. 2026-07-12 11:28 UTCEG score recompute
  21. 2026-07-12 11:28 UTCGHSA enrichment
  22. 2026-07-12 05:46 UTCEPSS rescore
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-12 00:37 UTCEG score recompute
  25. 2026-07-12 00:37 UTCGHSA enrichment
Show 9 more
  1. 2026-07-11 13:47 UTCEG score recompute
  2. 2026-07-11 13:47 UTCGHSA enrichment
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 02:57 UTCEG score recompute
  5. 2026-07-11 02:57 UTCGHSA enrichment
  6. 2026-07-10 16:07 UTCEG score recompute
  7. 2026-07-10 16:06 UTCGHSA enrichment
  8. 2026-07-10 05:14 UTCEG score recompute
  9. 2026-07-10 05:13 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-21046?
CVE-2026-21046 is a high vulnerability published on July 10, 2026. Time-of-check time-of-use race condition in fabricKeymaster trustlet prior to SMR Jul-2026 Release 1 allows local privileged attackers to execute arbitrary code.
When was CVE-2026-21046 disclosed?
CVE-2026-21046 was first published in the National Vulnerability Database on July 10, 2026, with the most recent update on July 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21046 actively exploited?
CVE-2026-21046 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-21046?
CVE-2026-21046 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-21046?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21046, 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-2026-21046

Explore →

Is Your Infrastructure Affected by CVE-2026-21046?

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

Start Free Scan →Browse All CVEs