CVE-2021-42278: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-03-30T13:25:44.447Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.

• Context preserved from previous revision: Active Directory Domain Services Elevation of Privilege Vulnerability Notes: 渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypass oa-getshell cve-cms

Technical Details

• CVE: CVE-2021-42278
• KEV date added: 2022-04-11
• KEV due date: 2022-05-02
• NVD published: Unknown
• NVD modified: Unknown
• MITRE modified: 2025-10-21
• CVSS base score: N/A
• CVSS vector: N/A
• CVSS exploitability score: N/A
• CVSS impact score: N/A
• Attack vector: Unknown
• Attack complexity: Unknown
• Privileges required: Unknown
• User interaction: Unknown
• Scope: Unknown
• Confidentiality impact: Unknown
• Integrity impact: Unknown
• Availability impact: Unknown

Versions and Products Impacted

• Microsoft / Windows Server 2019 (versions: 10.0.0)
• Microsoft / Windows Server 2019 (Server Core installation) (versions: 10.0.0)
• Microsoft / Windows Server 2022 (versions: 10.0.0)
• Microsoft / Windows Server version 2004 (versions: 10.0.0)
• Microsoft / Windows Server version 20H2 (versions: 10.0.0)
• Microsoft / Windows Server 2016 (versions: 10.0.0)
• Microsoft / Windows Server 2016 (Server Core installation) (versions: 10.0.0)
• Microsoft / Windows Server 2008 Service Pack 2 (versions: 6.0.0)
• Microsoft / Windows Server 2008 Service Pack 2 (Server Core installation) (versions: 6.0.0)
• Microsoft / Windows Server 2008 R2 Service Pack 1 (versions: 6.1.0)
• Microsoft / Windows Server 2008 R2 Service Pack 1 (Server Core installation) (versions: 6.0.0)
• Microsoft / Windows Server 2012 (versions: 6.2.0)
• Microsoft / Windows Server 2012 (Server Core installation) (versions: 6.2.0)
• Microsoft / Windows Server 2012 R2 (versions: 6.3.0)
• Microsoft / Windows Server 2012 R2 (Server Core installation) (versions: 6.3.0)

Weakness Classification

• CWE-noinfo Not enough information

Repositories for Lab Validation (Public Examples)

• No public repository matched this CVE query in the current run.

People and Organizations Mentioned

• microsoft
• Active Directory

Practical Defensive Validation (Authorized Only)

1. Use only isolated environments and systems you own or are explicitly authorized to test.
2. Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
3. Create low-privilege users on Microsoft / Windows Server 2019 (versions: 10.0.0) and validate that patching blocks unauthorized admin-level actions.
4. Compare token/privilege transitions in Windows Event Logs before and after remediation.
5. Tune detections for unusual group membership changes and SYSTEM-level process launches from user sessions.

References

• NVD record: https://nvd.nist.gov/vuln/detail/CVE-2021-42278
• MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42278
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
• KEV notes: https://nvd.nist.gov/vuln/detail/CVE-2021-42278
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42278
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42278

This content is for defensive security training and authorized validation only.