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Microsoft Edge Chromium Based CVE-2026-58284

| EUVDEUVD-2026-41582 HIGH
Improper Authorization (CWE-285)
2026-07-03 microsoft GHSA-28f5-cgmh-4pfj
8.3
CVSS 3.1 · Vendor: microsoft
Temporal: 7.2
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Severity by source

Vendor (microsoft) PRIMARY
8.3 HIGH
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CIRCL (temporal)
7.2 HIGH
cvss

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 03, 2026 - 21:32 vuln.today
CVE Published
Jul 03, 2026 - 20:35 nvd
HIGH 8.3

DescriptionCVE.org

Improper authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

AnalysisAI

Remote code execution in Microsoft Edge (Chromium-based) allows an unauthorized attacker to break out of the browser's security boundary and run arbitrary code when a victim is lured to malicious web content. Rooted in an improper authorization flaw (CWE-285) with a scope-changing CVSS 8.3 (AV:N/AC:H/PR:N/UI:R/S:C), exploitation requires user interaction and high attack complexity. …

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Recommended ActionAI

24 hours: Conduct inventory of all Microsoft Edge deployments and current version levels; confirm patch availability from Microsoft. …

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CVE-2026-58284 vulnerability details – vuln.today

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