Live › vulnerability › CVE-2021-42278
Go to dashboardMicrosoft Active Directory Domain Services has a privilege escalation flaw, the sAMAccountName spoofing issue tracked with CVE-2021-42278. CISA lists it as actively exploited, and an attacker with a low-privilege domain account can gain domain admin rights.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Active Directory | vendor | – | – |
Unknown from the sources.
Apply the Microsoft update for CVE-2021-42278 per vendor instructions (Microsoft guidance, not in the sources).
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-42278")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.