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 — 5 sources updated this week
8.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.3Exploit: NoneExposed: 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)
EPSS
48.6%
KEV
Not listed

Published

July 11, 2026

Last Modified

July 15, 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(1)

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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 30× in last 7d / 30× 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. 2026-07-15 17:08 UTCEG score recompute
  2. 2026-07-15 17:08 UTCVendor advisory
  3. 2026-07-15 17:08 UTCGHSA enrichment
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 03:58 UTCEG score recompute
  7. 2026-07-15 03:58 UTCVendor advisory
  8. 2026-07-15 03:58 UTCGHSA enrichment
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-14 14:49 UTCEG score recompute
  12. 2026-07-14 14:49 UTCVendor advisory
  13. 2026-07-14 14:48 UTCGHSA enrichment
  14. 2026-07-14 01:38 UTCEG score recompute
  15. 2026-07-14 01:38 UTCVendor advisory
  16. 2026-07-14 01:38 UTCGHSA enrichment
  17. 2026-07-13 22:31 UTCEPSS rescore
  18. 2026-07-13 12:28 UTCEG score recompute
  19. 2026-07-13 12:28 UTCGHSA enrichment
  20. 2026-07-13 06:13 UTCEPSS rescore
  21. 2026-07-13 06:13 UTCEPSS rescore
  22. 2026-07-12 23:18 UTCEG score recompute
  23. 2026-07-12 23:18 UTCVendor advisory
  24. 2026-07-12 23:18 UTCGHSA enrichment
  25. 2026-07-12 10:08 UTCEG score recompute
Show 5 more
  1. 2026-07-12 10:08 UTCVendor advisory
  2. 2026-07-12 10:08 UTCGHSA enrichment
  3. 2026-07-11 20:58 UTCEG score recompute
  4. 2026-07-11 20:58 UTCVendor advisory
  5. 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 15, 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 48.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-58281

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