CVE-2026-21525: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-21525) involves a null pointer dereference (CWE-476) in the Windows Remote Access Connection Manager component of Windows 10 Version 1607 (build 10.0.14393.0). An unauthorized attacker with local access can exploit this flaw to cause a denial of service condition by crashing the service. The CVSS v3.1 base score is 6.2 (medium severity), reflecting local attack vector, low complexity, no privileges required, no user interaction, and impact limited to availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service by crashing the Windows Remote Access Connection Manager service, affecting system availability. There is no impact on confidentiality or integrity. The vulnerability requires local access and no privileges, making it a local denial of service vector.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525 to remediate this vulnerability.
CVE-2026-21525: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Description
Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-21525) involves a null pointer dereference (CWE-476) in the Windows Remote Access Connection Manager component of Windows 10 Version 1607 (build 10.0.14393.0). An unauthorized attacker with local access can exploit this flaw to cause a denial of service condition by crashing the service. The CVSS v3.1 base score is 6.2 (medium severity), reflecting local attack vector, low complexity, no privileges required, no user interaction, and impact limited to availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service by crashing the Windows Remote Access Connection Manager service, affecting system availability. There is no impact on confidentiality or integrity. The vulnerability requires local access and no privileges, making it a local denial of service vector.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-30T18:10:54.846Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525","vendor":"Microsoft"}]
Threat ID: 698b76064b57a58fa120a6a1
Added to database: 2/10/2026, 6:16:38 PM
Last enriched: 5/12/2026, 5:15:30 AM
Last updated: 5/22/2026, 12:57:05 AM
Views: 213
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