CVE-2026-54121
Active Directory Certificate Services Elevation of Privilege Vulnerability
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Active Directory Certificate Services Elevation of Privilege Vulnerability
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-54121- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-285
- Updated
- 2026-11-02
EUVDEUVD-2026-44139
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
- Record
EUVD-2026-44139- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-64qv-2ffq-h4w6
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized...
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
- Record
GHSA-64qv-2ffq-h4w6- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-285
- Updated
- 2026-11-02
NVD
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-54121- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-285
- Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows server 2012
- microsoft windows server 2012 (server core installation)
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2025
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | aniqfakhrul/CVE-2026-54121 | 2026-07-23 |
| PoC in GitHub | HORKimhab/CVE-2026-54121 | 2026-07-25 |
| PoC in GitHub | ashrafzaryouh/CVE-2026-54121 | 2026-07-25 |
| PoC in GitHub | tc4dy/CVE-2026-54121-PoC-Exploit | 2026-07-25 |
| PoC in GitHub | GlendonNotGlen/certighost-cve-2026-54121-slides | 2026-07-26 |
| PoC in GitHub | marcgoam/CVE-2026-54121-CertiGhost | 2026-07-27 |
| PoC in GitHub | ChPratik/CVE-2026-54121 | 2026-07-28 |
| PoC in GitHub | KrakenEU/CVE-2026-54121-CertiGhost | 2026-07-31 |
| PoC in GitHub | nafiez/Metasploit-CVE-2026-54121-Certighost | 2026-07-31 |
| PoC in GitHub | AtlasVector/Certighost-CVE-2026-54121 | 2026-08-03 |
Show 4 moreShow less
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | sam00/POC-CVE-2026-54121-Certighost | 2026-08-03 |
| PoC in GitHub | L0u7r3/certighost | 2026-08-19 |
| PoC in GitHub | ushst/CVE-2026-54121-adcs-chase-nxc | 2026-10-14 |
| PoC in GitHub | anubis-update/CVE-2026-54121-Certighost | 2026-10-19 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploits | PoC in GitHub | |
| exploits | PoC in GitHub | |
| exploits, facts | PoC in GitHub | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-54121 is a high vulnerability (CVSS 8.8) in Microsoft Windows 10 Version 1607, published July 14, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.84%, the 79th percentile. No source names a fixed version.