Vulnerability Intelligence Report
Windows Kernel Remote Code Execution Vulnerability
CVE-2021-34458
Windows Kernel Remote Code Execution Vulnerability
No Active Exploit Signals
CVSS Base Score
9.9
CRITICAL
Exploitability:3.2
Impact Score:6.1
EPSS Probability:2.50%
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 2016 | 10.0.14393.0 < 10.0.14393.4530 (affected) |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 < 10.0.14393.4530 (affected) |
| Microsoft | Windows Server 2019 | 10.0.17763.0 < 10.0.17763.2061 (affected) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 < 10.0.17763.2061 (affected) |
| Microsoft | Windows Server version 2004 | 10.0.0 < 10.0.19041.1110 (affected) |
| Microsoft | Windows Server version 20H2 | 10.0.0 < 10.0.19042.1110 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
2.503%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2021-06-09T00:00:00 |
| Published | 2021-07-16T20:19:47 |
| Patch Date | 2021-07-13 |
| Last Updated | 2026-08-10T15:11:53 |
Community Chatter & Buzz