Search/CVE-2026-54121
● CVE — High

CVE-2026-54121

VendormicrosoftProductwindows server 2012, windows 10 1607, windows 10 1809, windows server 2016, windows server 2019, windows server 2022, windows server 2025DiscoveredJul 14, 2026UpdatedJul 21, 2026

Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.

View graph Watch Export
CVSS v3.1
8.8 HIGH
EPSS
0.78%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
3
sources referencing this CVE
Related IOCs
0
seen in the same coverage
Intelligence Reports7
7 intelligence reports available

Curated threat research and citations from CrowdStrike, Mandiant, Microsoft, and other sources — unlock with Premium.

Upgrade to Premium
EPSS Trend
Aug 26, 2026 → Sep 25, 2026
▼ 1.01pp
1.79% → 0.78% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Connections
11 relationships
Timeline
disclosure → media coverage
Jul 14, 2026
advisories.ncsc.nl reports: NCSC-2026-0231 [1.00] [M/H] Kwetsbaarheden verholpen in Microsoft Windows
Jul 14, 2026
Disclosure — published as a CVE record. · last revised by NVD Jul 21, 2026
Jul 27, 2026
helpnetsecurity.com reports: PoC exploit released for critical AD CS domain-takeover flaw (CVE-2026-54121)
Aug 17, 2026
bleepingcomputer.com reports: Certighost and the Privilege Hiding in Your Certificate Authority
Public PoC (10)
github.com/aniqfakhrul/CVE-2026-54121github.com/0xredash/CVE-2026-54121github.com/HORKimhab/CVE-2026-54121github.com/tc4dy/CVE-2026-54121-PoC-Exploitgithub.com/GlendonNotGlen/certighost-cve-2026-54121-slidesgithub.com/marcgoam/CVE-2026-54121-CertiGhostgithub.com/ChPratik/CVE-2026-54121github.com/nafiez/Metasploit-CVE-2026-54121-Certighostgithub.com/KrakenEU/CVE-2026-54121-CertiGhostgithub.com/AtlasVector/Certighost-CVE-2026-54121
Unverified third-party code — review before executing.