CVE-2026-21098

MEDIUMNVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-09-09. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: <0.1%CVSS: 6.1Exploit: None knownExposed services: Not assessed

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

Improper access control in Link to Windows prior to SMR Sep-2026 Release 1 allows local attackers to establish a connection with the PC without proper user interaction.

CVSS v3
6.1
EG Score
6.1MEDIUMhigh confidence
EG Risk
27
EG Risk 27/100CISA 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
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
<0.1%
EPSS %ILE
below the 1st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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 partial (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

September 9, 2026

Last Modified

September 28, 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-2026-21098(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 17× 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.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 13:13 UTCEG score recompute
  3. 2026-10-04 13:13 UTCGHSA enrichment
  4. 2026-10-03 10:28 UTCEG score recompute
  5. 2026-10-03 10:28 UTCGHSA enrichment
  6. 2026-10-02 06:54 UTCEG score recompute
  7. 2026-10-02 06:54 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-10-01 04:31 UTCEG score recompute
  10. 2026-10-01 04:31 UTCGHSA enrichment
  11. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-30 02:06 UTCEG score recompute
  13. 2026-09-30 02:06 UTCGHSA enrichment
  14. 2026-09-29 15:21 UTCEPSS rescore
  15. 2026-09-28 15:34 UTCEG score recompute▼ 0.80
  16. 2026-09-28 15:34 UTCGHSA enrichment
  17. 2026-09-28 15:32 UTCNVD updateCVSS v3 → 6.1
  18. 2026-09-28 06:22 UTCEG score recompute
  19. 2026-09-28 06:22 UTCGHSA enrichment
  20. 2026-09-27 13:47 UTCEPSS rescore
  21. 2026-09-27 03:59 UTCEG score recompute
  22. 2026-09-27 03:59 UTCGHSA enrichment
  23. 2026-09-26 15:58 UTCEPSS rescore
  24. 2026-09-26 01:34 UTCGHSA enrichment
  25. 2026-09-24 23:10 UTCEG score recompute
Show 37 more
  1. 2026-09-24 23:10 UTCGHSA enrichment
  2. 2026-09-24 14:03 UTCEPSS rescore
  3. 2026-09-23 20:30 UTCEG score recompute
  4. 2026-09-23 20:30 UTCGHSA enrichment
  5. 2026-09-22 18:06 UTCEG score recompute
  6. 2026-09-22 18:06 UTCGHSA enrichment
  7. 2026-09-21 15:42 UTCEG score recompute
  8. 2026-09-21 15:42 UTCGHSA enrichment
  9. 2026-09-20 20:15 UTCEPSS rescore
  10. 2026-09-20 13:18 UTCGHSA enrichment
  11. 2026-09-19 10:44 UTCEG score recompute
  12. 2026-09-19 10:44 UTCGHSA enrichment
  13. 2026-09-18 19:27 UTCEPSS rescore
  14. 2026-09-18 08:14 UTCEG score recompute
  15. 2026-09-18 08:14 UTCGHSA enrichment
  16. 2026-09-17 05:50 UTCEG score recompute
  17. 2026-09-17 05:50 UTCGHSA enrichment
  18. 2026-09-16 14:07 UTCEPSS rescore
  19. 2026-09-16 03:23 UTCEG score recompute
  20. 2026-09-16 03:23 UTCGHSA enrichment
  21. 2026-09-15 00:59 UTCGHSA enrichment
  22. 2026-09-13 22:35 UTCEG score recompute
  23. 2026-09-13 22:35 UTCGHSA enrichment
  24. 2026-09-13 16:47 UTCEPSS rescore
  25. 2026-09-12 20:12 UTCGHSA enrichment
  26. 2026-09-11 17:47 UTCEG score recompute
  27. 2026-09-11 17:47 UTCGHSA enrichment
  28. 2026-09-11 14:52 UTCEPSS rescore
  29. 2026-09-10 15:23 UTCEG score recompute
  30. 2026-09-10 15:23 UTCGHSA enrichment
  31. 2026-09-10 14:36 UTCEG score recompute
  32. 2026-09-10 14:36 UTCGHSA enrichment
  33. 2026-09-10 09:34 UTCEPSS rescore
  34. 2026-09-09 15:50 UTCGHSA enrichment
  35. 2026-09-09 05:25 UTCEG score recompute
  36. 2026-09-09 04:55 UTCEG score recompute
  37. 2026-09-09 04:55 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-21098?
CVE-2026-21098 is a medium vulnerability published on September 9, 2026. Improper access control in Link to Windows prior to SMR Sep-2026 Release 1 allows local attackers to establish a connection with the PC without proper user interaction.
When was CVE-2026-21098 disclosed?
CVE-2026-21098 was first published on September 9, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21098 actively exploited?
CVE-2026-21098 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a <0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-21098?
CVE-2026-21098 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-21098?
No fix for CVE-2026-21098 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-2026-21098 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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