CVE-2026-66316CWE-346

CVE-2026-66316

Medium · published August 4, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
10.9
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00212 · 10.9th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-08-04T04:17Z
Affected products (1)
ProductVersionsFixed in
microsoft/edge_chromium< 151.0.4129.59151.0.4129.59
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66316 · [email protected]
EPSS history
Timeline
  • 03 AUG 22:53Z
    Microsoft Edge (Chromium-based) Spoofing Vulnerability
    cvelistv5