CVE-2026-69486

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

CVE-2026-69486 is fixed in 4 products on 2 platforms, first by Microsoft Edge Dev 154.0.4238.0, released August 25, 2026. It is not reported as exploited. Patch Radar priority: High.

HighFixed on 2 platforms

CVSS

8.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0082

57th percentile

<p>Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
Microsoft Edge	153.0.4234.32	Microsoft Edge 153.0.4234.32	Sep 10, 2026
Microsoft Edge Beta	154.0.4258.12	Microsoft Edge Beta 154.0.4258.12	Sep 11, 2026
Microsoft Edge Dev	154.0.4238.0	Microsoft Edge Dev 154.0.4238.0	Aug 25, 2026
Microsoft Edge WebView2 Runtime	153.0.4234.46	Microsoft Edge WebView2 Runtime 153.0.4234.46	Sep 17, 2026
macOS
Microsoft Edge	153.0.4234.32	Microsoft Edge 153.0.4234.32	Sep 10, 2026

Details

Published
September 15, 2026
Weakness
Heap-based Buffer Overflow
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69486

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