CVE-2026-66798: Microsoft Edge Chromium

Medium severity, CVSS 4.3. EPSS: 0.8% chance of exploitation in the next 30 days.

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

Affected products

• Microsoft Edge Chromium: before 152.0.4191.53 (fixed in 152.0.4191.53)

Published 2026-08-28. Last modified 2026-09-11.