Elevation of Privilege Vulnerability in Microsoft Edge by Microsoft
CVE-2026-85899

8.1HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Edge (chromium-based)
Vendor
CVE Published:
29 October 2026

What is CVE-2026-85899?

A use after free vulnerability in the Microsoft Edge (Chromium-based) browser creates a potential security risk where an authorized attacker could exploit this weakness to elevate their privileges over a network. This could allow access to sensitive data or unauthorized control over affected systems. Users are advised to apply the latest security patches provided by Microsoft to mitigate this risk.

Affected Version(s)

Microsoft Edge (Chromium-based) 1.0.0.0 < 155.0.4283.45

References

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

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.