CVE-2026-66314CWE-367

CVE-2026-66314

Medium · published August 4, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
46.7
In the wild
Unconfirmed
What it is

Time-of-check time-of-use (toctou) race condition in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00574 · 46.7th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
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-2026-66314 · [email protected]
EPSS history
Timeline
  • 03 AUG 22:53Z
    Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
    cvelistv5