CVE-2026-83997: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-83997) involves a use-after-free condition in the Windows Message Queuing component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation could allow an attacker without privileges or user interaction to execute arbitrary code remotely. The CVSS v3.1 base score is 8.1, reflecting high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation enables remote code execution by an unauthorized attacker over the network, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft and should be applied promptly to affected systems. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83997 for detailed remediation instructions.
CVE-2026-83997: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
Description
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-83997) involves a use-after-free condition in the Windows Message Queuing component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation could allow an attacker without privileges or user interaction to execute arbitrary code remotely. The CVSS v3.1 base score is 8.1, reflecting high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation enables remote code execution by an unauthorized attacker over the network, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft and should be applied promptly to affected systems. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83997 for detailed remediation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-01T01:16:35.984Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83997","vendor":"Microsoft"}]
Threat ID: 6aa0457bacd9273b49fbdf6d
Added to database: 09/08/2026, 17:27:23 UTC
Last enriched: 09/08/2026, 17:37:59 UTC
Last updated: 09/09/2026, 00:24:28 UTC
Views: 6
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