CVE-2026-66313

MEDIUM CVSS 3.1: 6.8 EPSS 0.24%
Updated Aug 04, 2026
Microsoft
Parameter Value
CVSS 6.8 (MEDIUM)
Affected Versions 1.0.0.0 — 151.0.4129.59
Fixed In 151.0.4129.59
Type CWE-346 (Origin Validation Error)
Vendor Microsoft
Public PoC No

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Microsoft Edge_Chromium
cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*
1.0.0.0 151.0.4129.59