CVE-2026-66798
mediumUse after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Vendor / product: Microsoft — edge chromium
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVSS
4.3
4.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-08-28 20:19
Modified: 2026-10-28 21:17
NVD status: Analyzed
Last synced 9 hours ago
Verified against the source API 2026-10-28 22:10 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / edge_chromium <152.0.4191.53
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66798
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66798 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 22:10 UTC · record ↗