CVE-2026-78464CWE-367

CVE-2026-78464

High · published September 8, 2026

CVSS v3.1
7.0
EPSS
0%
Percentile
9.6
In the wild
Unconfirmed
What it is

Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
7.0 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00202 · 9.6th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Published
2026-09-08T22:20Z
Affected products (6)
ProductVersionsFixed in
microsoft/windows_11_24h2< 10.0.26100.944510.0.26100.9445
microsoft/windows_11_24h2< 10.0.26100.944510.0.26100.9445
microsoft/windows_11_25h2< 10.0.26200.944510.0.26200.9445
microsoft/windows_11_25h2< 10.0.26200.944510.0.26200.9445
microsoft/windows_11_26h1< 10.0.28000.295410.0.28000.2954
microsoft/windows_11_26h1< 10.0.28000.295410.0.28000.2954
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78464 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 17:18Z
    Windows MIDI Service Module Elevation of Privileges Vulnerability
    cvelistv5