CVE-2026-54121
HighPublished
Active Directory Certificate Services Elevation of Privilege Vulnerability
- Published
- Jul 14, 2026
- Updated
- Sep 17, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Aug 5, 2026
Primary CVSS
8.8/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.8%
Low · next 30 days
- Percentile
- 77.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
Sources
10- CVE-2026-54121Informational
CVE-2026-54121
- CVE-2026-54121Exploit
Certighost POC
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
Responsible use
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