CVE-2026-66798

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

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS

0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-28)

CWE

CWE-416

Published

2026-08-28

Modified

2026-10-28

Record from

the NVD, synced 2026-10-28

Affected

• microsoft:edge_chromium

References

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

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