Buffer Over-read Vulnerability in Microsoft Edge by Microsoft
CVE-2026-66312

6.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft Edge (chromium-based)
Vendor
CVE Published:
3 August 2026

What is CVE-2026-66312?

A buffer over-read vulnerability exists in Microsoft Edge (Chromium-based) that may allow an authorized attacker to execute arbitrary code over a network. This issue could lead to unauthorized access and execution of malicious code, posing a significant risk to users. It is essential to apply appropriate patches to mitigate the risk associated with this vulnerability.

Affected Version(s)

Microsoft Edge (Chromium-based) 1.0.0.0 < 151.0.4129.59

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.