CVE-2026-69821CWE-116

CVE-2026-69821

High · published September 8, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
25.3
In the wild
Unconfirmed
What it is

Improper encoding or escaping of output in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00333 · 25.3th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2026-09-08T22:19Z
Affected products (10)
ProductVersionsFixed in
microsoft/windows_10_1607< 10.0.14393.951210.0.14393.9512
microsoft/windows_10_1607< 10.0.14393.951210.0.14393.9512
microsoft/windows_10_1809< 10.0.17763.924510.0.17763.9245
microsoft/windows_10_1809< 10.0.17763.924510.0.17763.9245
microsoft/windows_server_2012all versions—
microsoft/windows_server_2012all versions—
microsoft/windows_server_2016< 10.0.14393.951210.0.14393.9512
microsoft/windows_server_2019< 10.0.17763.924510.0.17763.9245
microsoft/windows_server_2022< 10.0.20348.562210.0.20348.5622
microsoft/windows_server_2025< 10.0.26100.3343810.0.26100.33438
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69821 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:17Z
    EPSS moved — → 0%
    epss
  • 08 SEP 17:16Z
    Active Directory Certificate Services (AD CS) Elevation of Privilege Vulnerability
    cvelistv5