CVE-2026-85899

HIGH CVSS 3.1: 8.1
Updated Oct 30, 2026
Microsoft
Parameter Value
CVSS 8.1 (HIGH)
Affected Versions 1.0.0.0 — 155.0.4283.45
Fixed In 155.0.4283.45
Type CWE-416 (Use After Free)
Vendor Microsoft
Public PoC No

Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges over a network.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Microsoft Edge_Chromium
cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*
1.0.0.0 155.0.4283.45