CVE-2026-66315CWE-416

CVE-2026-66315

High · published August 4, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
48.4
In the wild
Unconfirmed
What it is

Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00608 · 48.4th percentile
Weakness
CWE-416 · Use After Free
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-2026-66315 · [email protected]
EPSS history
Timeline
  • 03 AUG 22:53Z
    Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
    cvelistv5