CVE-2026-58281

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH 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(high)
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
50%
KEV
Not listed

Published

July 11, 2026

Last Modified

July 26, 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 23× in last 7d / 61× 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. 2026-07-27 14:14 UTCEPSS rescore
  2. 2026-07-27 07:22 UTCVendor advisory
  3. 2026-07-27 07:22 UTCGHSA enrichment
  4. 2026-07-26 18:11 UTCEG score recompute
  5. 2026-07-26 18:11 UTCVendor advisory
  6. 2026-07-26 18:11 UTCGHSA enrichment
  7. 2026-07-26 14:54 UTCEPSS rescore
  8. 2026-07-26 14:54 UTCEPSS rescore
  9. 2026-07-26 05:07 UTCEG score recompute
  10. 2026-07-26 05:07 UTCVendor advisory
  11. 2026-07-26 05:06 UTCGHSA enrichment
  12. 2026-07-25 14:18 UTCEPSS rescore
  13. 2026-07-25 14:18 UTCEPSS rescore
  14. 2026-07-24 14:18 UTCEPSS rescore
  15. 2026-07-24 14:18 UTCEPSS rescore
  16. 2026-07-23 14:18 UTCEPSS rescore
  17. 2026-07-23 14:18 UTCEPSS rescore
  18. 2026-07-23 03:21 UTCEG score recompute
  19. 2026-07-22 14:08 UTCEPSS rescore
  20. 2026-07-22 14:08 UTCEPSS rescore
  21. 2026-07-21 15:25 UTCEPSS rescore
  22. 2026-07-21 15:25 UTCEPSS rescore
  23. 2026-07-20 17:08 UTCEPSS rescore
  24. 2026-07-19 14:31 UTCEPSS rescore
  25. 2026-07-19 14:31 UTCEPSS rescore
Show 36 more
  1. 2026-07-19 03:42 UTCEG score recompute
  2. 2026-07-19 03:42 UTCVendor advisory
  3. 2026-07-19 03:42 UTCGHSA enrichment
  4. 2026-07-19 02:29 UTCEPSS rescore
  5. 2026-07-18 10:04 UTCEPSS rescore
  6. 2026-07-17 08:24 UTCEG score recompute
  7. 2026-07-17 08:24 UTCVendor advisory
  8. 2026-07-17 08:24 UTCGHSA enrichment
  9. 2026-07-16 19:30 UTCVendor advisory
  10. 2026-07-16 19:30 UTCGHSA enrichment
  11. 2026-07-16 17:03 UTCEPSS rescore
  12. 2026-07-16 06:20 UTCVendor advisory
  13. 2026-07-16 06:19 UTCGHSA enrichment
  14. 2026-07-15 17:08 UTCVendor advisory
  15. 2026-07-15 17:08 UTCGHSA enrichment
  16. 2026-07-15 16:57 UTCEPSS rescore
  17. 2026-07-15 16:57 UTCEPSS rescore
  18. 2026-07-15 03:58 UTCVendor advisory
  19. 2026-07-15 03:58 UTCGHSA enrichment
  20. 2026-07-15 02:00 UTCEPSS rescore
  21. 2026-07-15 02:00 UTCEPSS rescore
  22. 2026-07-14 14:49 UTCVendor advisory
  23. 2026-07-14 14:48 UTCGHSA enrichment
  24. 2026-07-14 01:38 UTCVendor advisory
  25. 2026-07-14 01:38 UTCGHSA enrichment
  26. 2026-07-13 22:31 UTCEPSS rescore
  27. 2026-07-13 12:28 UTCGHSA enrichment
  28. 2026-07-13 06:13 UTCEPSS rescore
  29. 2026-07-13 06:13 UTCEPSS rescore
  30. 2026-07-12 23:18 UTCVendor advisory
  31. 2026-07-12 23:18 UTCGHSA enrichment
  32. 2026-07-12 10:08 UTCVendor advisory
  33. 2026-07-12 10:08 UTCGHSA enrichment
  34. 2026-07-11 20:58 UTCEG score recompute
  35. 2026-07-11 20:58 UTCVendor advisory
  36. 2026-07-11 20:57 UTCMITRE cvelistV5first tracked

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 July 26, 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 50.5% 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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