CVE-2026-83862
Awaiting Analysis Awaiting Analysis - Queue

Use After Free in Windows Network Load Balancing

Publication date: 2026-10-13

Last updated on: 2026-10-14

Assigner: Microsoft Corporation

Description
Use after free in Windows Network Load Balancing allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-13
Last Modified
2026-10-14
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-83862
EUVD
EUVD-2026-99392

Affected Vendors & Products

Showing 13 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1607 10.0.14393.0
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows Server 2012 6.2.9200.0
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0
Microsoft Windows Server 2012 R2 6.3.9600.0
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft Windows Server 2016 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a use-after-free vulnerability in Windows Network Load Balancing. It allows an unauthorized attacker to execute arbitrary code remotely over a network by exploiting a memory corruption issue.

Detection Guidance

Detection of this vulnerability requires monitoring for unusual network traffic or system behavior related to Windows Network Load Balancing. Check for unexpected process crashes or memory corruption events in Windows logs. Use tools like Windows Event Viewer to inspect System and Application logs for errors related to network load balancing or memory management.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially gaining control over it. This could lead to data theft, installation of malware, or disruption of services.

Compliance Impact

This vulnerability allows remote code execution via a use-after-free flaw in Windows Network Load Balancing. Such vulnerabilities can lead to unauthorized access, data breaches, or system compromise, which may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Network Load Balancing use-after-free vulnerability. Monitor Microsoft's update guide for the specific patch.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-83862. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart