CVE-2026-83666CWE-362

CVE-2026-83666

High · published October 13, 2026

CVSS v3.1
7.0
EPSS
0%
Percentile
9.2
In the wild
Unconfirmed
What it is

Concurrent execution using shared resource with improper synchronization ('race condition') in Active Directory Certificate Services (AD CS) 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
0.00199 · 9.2th percentile
Weakness
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
2026-10-13T23:20Z
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83666 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:34Z
    EPSS moved — → 0%
    epss
  • 13 OCT 18:59Z
    Active Directory Certificate Services (AD CS) Elevation of Privilege Vulnerability
    cvelistv5
  • 13 OCT 18:59Z
    Active Directory Certificate Services (AD CS) Elevation of Privilege Vulnerability
    cvelistv5