CVE-2026-44805: CWE-416: Use After Free in Microsoft Windows Server 2019
CVE-2026-44805 is a use-after-free vulnerability in the Windows Network Controller Host Agent on Windows Server 2019. It allows an authorized local attacker to cause a denial of service by triggering the use-after-free condition. The vulnerability has a medium severity rating with a CVSS score of 5. 5. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Windows Network Controller (NC) Host Agent component of Microsoft Windows Server 2019 (version 10.0.17763.0). An attacker with local authorized access can exploit this flaw to cause a denial of service (DoS) by freeing memory prematurely and then using it, leading to system instability or crash. The vulnerability does not impact confidentiality or integrity but affects availability. Microsoft has published an official fix for this issue.
Potential Impact
The vulnerability allows an authorized local attacker to deny service on the affected Windows Server 2019 system by exploiting a use-after-free flaw in the Network Controller Host Agent. There is no impact on confidentiality or integrity, but availability is affected due to potential system crashes or instability.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44805 to remediate this vulnerability.
CVE-2026-44805: CWE-416: Use After Free in Microsoft Windows Server 2019
Description
CVE-2026-44805 is a use-after-free vulnerability in the Windows Network Controller Host Agent on Windows Server 2019. It allows an authorized local attacker to cause a denial of service by triggering the use-after-free condition. The vulnerability has a medium severity rating with a CVSS score of 5. 5. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Windows Network Controller (NC) Host Agent component of Microsoft Windows Server 2019 (version 10.0.17763.0). An attacker with local authorized access can exploit this flaw to cause a denial of service (DoS) by freeing memory prematurely and then using it, leading to system instability or crash. The vulnerability does not impact confidentiality or integrity but affects availability. Microsoft has published an official fix for this issue.
Potential Impact
The vulnerability allows an authorized local attacker to deny service on the affected Windows Server 2019 system by exploiting a use-after-free flaw in the Network Controller Host Agent. There is no impact on confidentiality or integrity, but availability is affected due to potential system crashes or instability.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44805 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-07T20:07:18.270Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44805","vendor":"Microsoft"}]
Threat ID: 6a284cce8dd33fbd85664a06
Added to database: 6/9/2026, 5:26:38 PM
Last enriched: 6/9/2026, 10:42:22 PM
Last updated: 6/10/2026, 4:34:01 AM
Views: 9
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