ACTIVELY EXPLOITED
CVE-2021-42287: Microsoft Active Directory Domain Services Privilege Escalation Vulnerability
| Vendor | Microsoft |
|---|---|
| Product | Active Directory |
| Actively exploited | Yes |
| Added to CISA KEV | 11 Apr 2022 |
| CISA federal deadline | 2 May 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-269 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
SOURCES
Other Microsoft flaws
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- CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
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- CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.