Vulnerability Intelligence Report
Windows Remote Access Connection Manager Denial of Service Vulnerability
CVE-2026-21525
Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
6.2
MEDIUM
Exploitability:2.6
Impact Score:3.6
EPSS Probability:4.96%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-476 ↗CWE-476: NULL Pointer Dereference
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 < 10.0.14393.8868 (affected) |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 < 10.0.17763.8389 (affected) |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 < 10.0.19044.6937 (affected) |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 < 10.0.19045.6937 (affected) |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 < 10.0.22631.6649 (affected) |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 < 10.0.22631.6649 (affected) |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 < 10.0.26100.7840 (affected) |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 < 10.0.26200.7840 (affected) |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 < 10.0.28000.1575 (affected) |
| Microsoft | Windows 11 Version 26H1 | 10.0.28000.0 < 10.0.28000.1575 (affected) |
| Microsoft | Windows Server 2012 | 6.2.9200.0 < 6.2.9200.25923 (affected) |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 < 6.2.9200.25923 (affected) |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 < 6.3.9600.23022 (affected) |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 < 6.3.9600.23022 (affected) |
| Microsoft | Windows Server 2016 | 10.0.14393.0 < 10.0.14393.8868 (affected) |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 < 10.0.14393.8868 (affected) |
| Microsoft | Windows Server 2019 | 10.0.17763.0 < 10.0.17763.8389 (affected) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 < 10.0.17763.8389 (affected) |
| Microsoft | Windows Server 2022 | 10.0.20348.0 < 10.0.20348.4773 (affected) |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 < 10.0.25398.2149 (affected) |
| Microsoft | Windows Server 2025 | 10.0.26100.0 < 10.0.26100.32370 (affected) |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 < 10.0.26100.32370 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2025-12-30T18:10:54 |
| Published | 2026-02-10T17:51:34 |
| Patch Date | 2026-02-10 |
| Last Updated | 2026-08-19T16:26:04 |
Community Chatter & Buzz