CVE-2026-58281

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-07-11. 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 a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.3Exploit: None knownExposed: 0

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

Deserialization of untrusted data in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

CVSS v3
8.3
EG Score
8.3(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity83% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
60%
KEV
Not listed

Published

July 11, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Jul 11, 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-2026-58281

Vendor Advisories for CVE-2026-58281(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 9× in last 7d / 91× 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 311 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58281?
CVE-2026-58281 is a high vulnerability published on July 11, 2026. Deserialization of untrusted data in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
When was CVE-2026-58281 disclosed?
CVE-2026-58281 was first published in the National Vulnerability Database on July 11, 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-2026-58281 actively exploited?
CVE-2026-58281 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 40.1% of all scored CVEs.
What is the CVSS score of CVE-2026-58281?
CVE-2026-58281 has a CVSS v4.0 base score of 8.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-58281?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58281, 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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