CVE-2026-66321CWE-843

CVE-2026-66321

High · published August 4, 2026

CVSS v3.1
7.4
EPSS
1%
Percentile
64.5
In the wild
Unconfirmed
What it is

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.01066 · 64.5th percentile
Weakness
CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')
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-2026-66321 · [email protected]
EPSS history
Timeline
  • 03 AUG 22:51Z
    Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
    cvelistv5