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CVE-2026-66312

HighCVSS 8.8/10Last modified Oct 23, 2026

Description

Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Microsoft Edge (Chromium-based)	>= 1.0.0.0, < 151.0.4129.59

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66312Vendor Advisory

Timeline

Published: Aug 4, 2026
Last modified: Oct 23, 2026
NVD status: Analyzed

Related CVEs from 2026

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CVE-2026-66312: High severity, CVSS 8.8 | Vulnix