CVE-2026-56645CWE-122

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

High · published July 3, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
56.8
In the wild
Unconfirmed
What it is

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00819 · 56.8th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-07-03T20:35Z
EPSS history
Timeline
  • 03 JUL 20:35Z
    Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
    cvelistv5