CVE-2026-66318

high Microsoft
CVSS v3 Base Score
8.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS Score
0.4%
Exploitation probability in 30 days
Top 71% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Published: August 4, 2026 (34 days ago)
Last Modified: August 6, 2026
Vendor: Microsoft
Source: NVD

Description

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

CWE

CWE-346

Affected Products

microsoft edge chromium

References

🔗 msrc.microsoft.com