CVE-2021-42287

VendormicrosoftProductwindows server 2008, windows server 2012, windows server 2016, windows server 2019, windows server 2022, windows server 20h2, windows server 2004DiscoveredNov 10, 2021UpdatedAug 19, 2026

Active Directory Domain Services Elevation of Privilege Vulnerability

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CVSS v3.1

7.5 HIGH

EPSS

77.2%

probability of exploitation in 30 days

CISA KEV

Listed

confirmed active exploitation

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

EPSS Trend

Aug 16, 2026 → Sep 4, 2026

▲ 2.91pp

74.3% → 77.2% over 4 tracked changes

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityHIGH

Privileges RequiredLOW

User InteractionNONE

ScopeUNCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityHIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Connections

7 relationships

Timeline

disclosure → media coverage

Nov 10, 2021

Disclosure — published as a CVE record. · last revised by NVD Aug 19, 2026

Public PoC (7)

github.com/cube0x0/noPac github.com/ricardojba/Invoke-noPac github.com/knightswd/NoPacScan github.com/XiaoliChan/Invoke-sAMSpoofing github.com/TryA9ain/noPac github.com/DanielFEXKEX/CVE-Scanner github.com/Chrisync/CVE-Scanner

Unverified third-party code — review before executing.