CVE-2026-66798

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

State: Published
Severity: 4.3 Medium
Published: Aug 28, 2026
Updated: Oct 30, 2026
Reserved: Jul 27, 2026

Description

Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
Microsoft Edge (Chromium-based)Microsoft	1.0.0.0 to before 152.0.4191.53Affected
Microsoft Edge for AndroidMicrosoft	1.0.0.0 to before 152.0.4191.52Affected
Microsoft Edge for iOSMicrosoft	1.0.0.0 to before 152.0.4191.52Affected
Microsoft Edge for LinuxMicrosoft	1.0.0 to before 152.0.4191.52Affected
Microsoft Edge for MACMicrosoft	1.0.0.0 to before 152.0.4191.52Affected
Microsoft Edge for WindowsMicrosoft	1.0.0.0 to before 152.0.4191.52Affected

References

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilityvendor-advisorypatch

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