CVE-2026-58286

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. the CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: 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 Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Jul 7, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58286

Vendor Advisories for CVE-2026-58286(2)

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 49× in last 7d / 146× 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 146 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-58286?
CVE-2026-58286 is a high vulnerability published on July 3, 2026. Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
When was CVE-2026-58286 disclosed?
CVE-2026-58286 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58286 actively exploited?
CVE-2026-58286 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 75.1% of all scored CVEs.
What is the CVSS score of CVE-2026-58286?
CVE-2026-58286 has a CVSS v4.0 base score of 8.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-58286?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58286, 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

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