CVE-2026-66798CWE-416

CVE-2026-66798

Medium · published August 29, 2026

CVSS v3.1
4.3
EPSS
1%
Percentile
55.6
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
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00786 · 55.6th percentile
Weakness
CWE-416 · Use After Free
Published
2026-08-29T00:19Z
Affected products (1)
ProductVersionsFixed in
microsoft/edge_chromium< 152.0.4191.53152.0.4191.53
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66798 · [email protected]
EPSS history
Timeline
  • 30 AUG 16:19Z
    EPSS moved — → 1%
    epss
  • 28 AUG 17:45Z
    Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
    cvelistv5