CVE-2026-21085

MEDIUMNVD 6.76.7—
EchelonGraph scoreHIGH confidence

Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2026-09-09. NVD baseline CVSS 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.7Exploit: None knownExposed: 0

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

Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.

CVSS v3
6.7
EG Score
6.7(high)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity67% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 11, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

Samsung Mobile Security

https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=09

Vendor Advisories for CVE-2026-21085(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 11× in last 7d / 44× 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. 2026-09-25 08:26 UTCEG score recompute
  2. 2026-09-25 08:26 UTCGHSA enrichment
  3. 2026-09-24 14:03 UTCEPSS rescore
  4. 2026-09-24 08:11 UTCEG score recompute
  5. 2026-09-24 08:11 UTCGHSA enrichment
  6. 2026-09-23 07:55 UTCGHSA enrichment
  7. 2026-09-22 07:38 UTCEG score recompute
  8. 2026-09-22 07:38 UTCGHSA enrichment
  9. 2026-09-21 07:23 UTCGHSA enrichment
  10. 2026-09-20 07:03 UTCGHSA enrichment
  11. 2026-09-19 06:34 UTCGHSA enrichment
  12. 2026-09-18 06:17 UTCEG score recompute
  13. 2026-09-18 06:17 UTCGHSA enrichment
  14. 2026-09-17 06:01 UTCEG score recompute
  15. 2026-09-17 06:01 UTCGHSA enrichment
  16. 2026-09-16 14:07 UTCEPSS rescore
  17. 2026-09-16 05:45 UTCEG score recompute
  18. 2026-09-16 05:45 UTCGHSA enrichment
  19. 2026-09-16 05:15 UTCEPSS rescore
  20. 2026-09-15 05:29 UTCEG score recompute
  21. 2026-09-15 05:29 UTCGHSA enrichment
  22. 2026-09-14 05:08 UTCEG score recompute
  23. 2026-09-14 05:08 UTCGHSA enrichment
  24. 2026-09-13 16:47 UTCEPSS rescore
  25. 2026-09-13 04:53 UTCGHSA enrichment
Show 19 more
  1. 2026-09-12 04:37 UTCEG score recompute
  2. 2026-09-12 04:37 UTCGHSA enrichment
  3. 2026-09-11 14:52 UTCEPSS rescore
  4. 2026-09-11 04:21 UTCGHSA enrichment
  5. 2026-09-11 04:01 UTCEG score recompute
  6. 2026-09-11 04:01 UTCGHSA enrichment
  7. 2026-09-10 20:43 UTCEG score recompute▼ 1.70
  8. 2026-09-10 20:43 UTCGHSA enrichment
  9. 2026-09-10 20:42 UTCNVD updateCVSS v3 → 6.7 · severity → MEDIUM
  10. 2026-09-10 15:23 UTCEG score recompute
  11. 2026-09-10 15:23 UTCGHSA enrichment
  12. 2026-09-10 14:36 UTCEG score recompute
  13. 2026-09-10 14:36 UTCGHSA enrichment
  14. 2026-09-10 09:34 UTCEPSS rescore
  15. 2026-09-10 04:53 UTCGHSA enrichment
  16. 2026-09-09 15:51 UTCGHSA enrichment
  17. 2026-09-09 05:25 UTCEG score recompute
  18. 2026-09-09 04:55 UTCEG score recompute
  19. 2026-09-09 04:55 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-21085?
CVE-2026-21085 is a medium vulnerability published on September 9, 2026. Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.
When was CVE-2026-21085 disclosed?
CVE-2026-21085 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21085 actively exploited?
CVE-2026-21085 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 98.8% of all scored CVEs.
What is the CVSS score of CVE-2026-21085?
CVE-2026-21085 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2026-21085?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21085, 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-2026-21085

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