Remote Code Execution Vulnerability in Microsoft Edge (Chromium-based)
CVE-2026-66323

5.4MEDIUM

Key Information:

Vendor

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

What is CVE-2026-66323?

An improper neutralization of parameter/argument delimiters in Microsoft Edge (Chromium-based) can be exploited by unauthorized attackers to execute malicious code over an affected network. This vulnerability poses significant risks to users, enabling attackers to manipulate web requests and gain unauthorized access to systems. Immediate action is advised to mitigate potential threats.

Affected Version(s)

Microsoft Edge (Chromium-based) 1.0.0.0 < 152.0.4191.53

References

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

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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