CVE-2026-58286

MEDIUMNVD 6.98.1▲
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. the CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 6 sources updated this week
6.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.9Exploit: NoneExposed: 0

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

Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

CVSS v3
6.9
EG Score
8.1(high)
EPSS
30.5%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 7, 2026

Advisory Details (1)

Auto-updated Jul 7, 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-2026-58286

Vendor Advisories for CVE-2026-58286(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 33× in last 7d / 33× 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. 2026-07-07 05:54 UTCNVD updateCVSS v3 → 6.9 · severity → MEDIUM
  2. 2026-07-07 05:01 UTCEG score recompute
  3. 2026-07-07 05:01 UTCVendor advisory
  4. 2026-07-07 05:01 UTCGHSA enrichment
  5. 2026-07-07 03:31 UTCMITRE cvelistV5CVSS v3 → 8.1 · severity → HIGH
  6. 2026-07-06 19:18 UTCNVD updateCVSS v3 → 6.9 · severity → MEDIUM
  7. 2026-07-06 17:48 UTCEG score recompute
  8. 2026-07-06 17:48 UTCVendor advisory
  9. 2026-07-06 17:48 UTCGHSA enrichment
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 06:33 UTCEG score recompute
  13. 2026-07-06 06:33 UTCVendor advisory
  14. 2026-07-06 06:33 UTCGHSA enrichment
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-06 02:23 UTCEPSS rescore
  17. 2026-07-05 19:19 UTCEG score recompute
  18. 2026-07-05 19:19 UTCVendor advisory
  19. 2026-07-05 19:19 UTCGHSA enrichment
  20. 2026-07-05 08:06 UTCEG score recompute
  21. 2026-07-05 08:06 UTCVendor advisory
  22. 2026-07-05 08:06 UTCGHSA enrichment
  23. 2026-07-05 02:31 UTCEPSS rescore
  24. 2026-07-05 02:30 UTCEPSS rescore
  25. 2026-07-04 20:53 UTCEG score recompute
Show 8 more
  1. 2026-07-04 20:53 UTCVendor advisory
  2. 2026-07-04 20:53 UTCGHSA enrichment
  3. 2026-07-04 09:41 UTCEG score recompute
  4. 2026-07-04 09:41 UTCVendor advisory
  5. 2026-07-04 09:41 UTCGHSA enrichment
  6. 2026-07-03 22:27 UTCEG score recompute
  7. 2026-07-03 22:27 UTCVendor advisory
  8. 2026-07-03 22:27 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-58286?
CVE-2026-58286 is a medium vulnerability published on July 3, 2026. Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
When was CVE-2026-58286 disclosed?
CVE-2026-58286 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58286 actively exploited?
CVE-2026-58286 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58286?
CVE-2026-58286 has a CVSS v3 base score of 6.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.1.
How do I remediate CVE-2026-58286?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58286, 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-2026-58286

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