CVE-2026-21099

MEDIUMNVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-09. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

Improper access control in SettingsProvider prior to SMR Sep-2026 Release 1 allows local attackers to access sensitive information.

CVSS v3
5.5
EG Score
5.5(high)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 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 10, 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-2026-21099(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 16× in last 7d / 31× 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. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 10:11 UTCEG score recompute
  3. 2026-09-18 10:11 UTCGHSA enrichment
  4. 2026-09-17 08:22 UTCEG score recompute
  5. 2026-09-17 08:22 UTCGHSA enrichment
  6. 2026-09-16 14:07 UTCEPSS rescore
  7. 2026-09-16 06:30 UTCEG score recompute
  8. 2026-09-16 06:30 UTCGHSA enrichment
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 04:41 UTCGHSA enrichment
  11. 2026-09-14 02:49 UTCEG score recompute
  12. 2026-09-14 02:49 UTCGHSA enrichment
  13. 2026-09-13 16:47 UTCEPSS rescore
  14. 2026-09-13 01:01 UTCEG score recompute
  15. 2026-09-13 01:01 UTCGHSA enrichment
  16. 2026-09-12 15:01 UTCEPSS rescore
  17. 2026-09-11 23:12 UTCEG score recompute
  18. 2026-09-11 23:12 UTCGHSA enrichment
  19. 2026-09-11 14:52 UTCEPSS rescore
  20. 2026-09-10 20:43 UTCEG score recompute▲ 0.40
  21. 2026-09-10 20:43 UTCGHSA enrichment
  22. 2026-09-10 20:42 UTCNVD updateCVSS v3 → 5.5
  23. 2026-09-10 15:23 UTCEG score recompute
  24. 2026-09-10 15:23 UTCGHSA enrichment
  25. 2026-09-10 14:25 UTCEG score recompute
Show 6 more
  1. 2026-09-10 14:25 UTCGHSA enrichment
  2. 2026-09-10 09:34 UTCEPSS rescore
  3. 2026-09-09 15:50 UTCGHSA enrichment
  4. 2026-09-09 05:25 UTCEG score recompute
  5. 2026-09-09 04:55 UTCEG score recompute
  6. 2026-09-09 04:55 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-21099?
CVE-2026-21099 is a medium vulnerability published on September 9, 2026. Improper access control in SettingsProvider prior to SMR Sep-2026 Release 1 allows local attackers to access sensitive information.
When was CVE-2026-21099 disclosed?
CVE-2026-21099 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21099 actively exploited?
CVE-2026-21099 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 99.4% of all scored CVEs.
What is the CVSS score of CVE-2026-21099?
CVE-2026-21099 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-21099?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21099, 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-2026-21099

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