CVE-2026-58284 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

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

Published: 2026-07-03 Last update: 2026-07-06 Assigner: [email protected] Source: [email protected]
NVD Status：Received，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-58284 is rated Moderate Risk (44.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.41%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-58284

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-07-04 — 0.41% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-58284

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.3 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 6.0 [email protected]

Weakness enumeration for CVE-2026-58284

GitHub Security Advisory for CVE-2026-58284

GHSA-28f5-cgmh-4pfj · Severity: high — Improper authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to...

Affected software / configurations for CVE-2026-58284

Vendor Product Version Raw CPE
microsoft edge_chromium >= 1.0.0.0, < 150.0.4078.48 cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*

References for CVE-2026-58284

cvelogic Threat Intelligence