CVE-2026-66312 Details
Description
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
A buffer over-read vulnerability has been identified in Microsoft Edge (Chromium-based) version 151.0.4129.59. This vulnerability allows an authorized attacker to execute code remotely over a network. The issue arises from improper handling of buffer data, which could be exploited to execute malicious code.
Users can download the security update for this vulnerability from the Microsoft Update Catalog. For more information, see the release notes on the Microsoft Edge (Chromium-based) security updates.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66312 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-126 | Buffer Over-read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft edge chromium | < 151.0.4129.59 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 6, 2026 | Initial Analysis | [email protected] |
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 4, 2026 | CVE Modified | CISA-ADP |
| Aug 4, 2026 | New CVE Received | [email protected] |