Vulnerability Intelligence Report
Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-26897
Windows DNS Server Remote Code Execution Vulnerability
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:13.91%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 < 6.1.7601.24566 (affected) |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 < 6.1.7601.24566 (affected) |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 < 6.0.6003.21070 (affected) |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 < 6.0.6003.21070 (affected) |
| Microsoft | Windows Server 2012 | 6.2.9200.0 < 6.2.9200.23298 (affected) |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 < 6.2.9200.23298 (affected) |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 < 6.3.9600.19968 (affected) |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 < 6.3.9600.19968 (affected) |
| Microsoft | Windows Server 2016 | 10.0.14393.0 < 10.0.14393.4283 (affected) |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 < 10.0.14393.4283 (affected) |
| Microsoft | Windows Server 2019 | 10.0.17763.0 < 10.0.17763.1817 (affected) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 < 10.0.17763.1817 (affected) |
| Microsoft | Windows Server version 2004 | 10.0.0 < 10.0.19043.867 (affected) |
| Microsoft | Windows Server version 20H2 | 10.0.0 < 10.0.19043.867 (affected) |
| Microsoft | Windows Server, version 1909 (Server Core installation) | 10.0.0 < 10.0.18363.1440 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
13.912%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2021-02-08T00:00:00 |
| Published | 2021-03-11T15:43:32 |
| Patch Date | 2021-03-09 |
| Last Updated | 2026-08-19T16:30:36 |
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