CVE-2026-58289

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreMEDIUM confidence

Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-03. the CNA's CVSS baseline 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this weekElevated
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.0Exploit: Elevated riskExposed: 0

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

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

CVSS v3
9.0
EG Score
9.0(medium)
EG Risk
57(Track)
EG Risk 57/100SSVC: 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
Severity90% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
80%
KEV
Not listed

Published

July 3, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Jul 6, 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-2026-58289

Vendor Advisories for CVE-2026-58289(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 27× in last 7d / 143× 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 656 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52632
    First seen Aug 10, 2026

    Microsoft Edge 150.0.4078.48 - RCE

    Open source ↗

Frequently asked(5)

What is CVE-2026-58289?
CVE-2026-58289 is a critical vulnerability published on July 3, 2026. Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
When was CVE-2026-58289 disclosed?
CVE-2026-58289 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58289 actively exploited?
CVE-2026-58289 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 20.2% of all scored CVEs.
What is the CVSS score of CVE-2026-58289?
CVE-2026-58289 has a CVSS v4.0 base score of 9.0 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-58289?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58289, 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-2026-58289

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