CVE-2026-66311CWE-862broken-access-control

CVE-2026-66311

Medium · published August 4, 2026

CVSS v3.1
6.2
EPSS
0%
Percentile
33.6
In the wild
Unconfirmed
What it is

Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.

The record
Technical detail
CVSS v3.1
6.2 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00405 · 33.6th percentile
Weakness
CWE-862 · Missing Authorization
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-2026-66311 · [email protected]
EPSS history
Timeline
  • 03 AUG 22:57Z
    Microsoft Edge (Chromium-based) Tampering Vulnerability
    cvelistv5