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CVE-2026-58284Important

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

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

Severity
Important
CVSS base score
8.3CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
EPSS, next 30 days
0.6%Higher than 44.5% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
Exploitability
Exploitation Unlikely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Microsoft Edge (Chromium-based)
Weakness
CWE-285: Improper Authorization
Issued by
Microsoft
Published
3 Jul 2026 · July 2026
Last revised
3 Jul 2026

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Browser
1 affected product
  • Microsoft Edge (Chromium-based)
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