CVE-2026-66798

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

Score

CVSS 3.1 4.3 Medium

Status

Analyzed - secure@microsoft.com

Published

2026-08-28

Last modified

2026-10-28

Weaknesses

CWE-416

Affected products

• Edge (Microsoft)
• Edge Chromium (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66798