CVE-2026-58285

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. The CNA's CVSS baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
8.3EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.3Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

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
8.3
EG Score
8.3HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA 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
Severity83% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.6%
EPSS %ILE
47th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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

July 3, 2026

Last Modified

October 8, 2026

Advisory Details (1)

Auto-updated Jul 6, 2026
Fix referenced — no release confirmed yet. Sources: microsoft.
microsoftMentions a patch (unverified)

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-2026-58285

Vendor Advisories for CVE-2026-58285(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 10× in last 7d / 48× 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 391 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58285?
CVE-2026-58285 is a high 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-2026-58285 disclosed?
CVE-2026-58285 was first published on July 3, 2026, with the most recent update on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58285 actively exploited?
CVE-2026-58285 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-58285?
CVE-2026-58285 has a CVSS base score of 8.3 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-58285?
A fix for CVE-2026-58285 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-58285 are linked in the Vendor Advisories panel on this page.

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