CVE-2026-83832

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Out-of-Bounds Read in Windows Spaceport.sys

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-83832

EUVD

EUVD-2026-99374

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	10 Version 21H2 10.0.19044.0
Microsoft	Windows	10 Version 22H2 10.0.19045.0
Microsoft	Windows	11 version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 24H2 10.0.26100.0
Microsoft	Windows	11 Version 25H2 10.0.26200.0
Microsoft	Windows	11 version 26H1 10.0.28000.0
Microsoft	Windows	11 Version 26H2 10.0.26300.0
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

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability in the Windows Spaceport.sys driver. An authorized attacker with local access can exploit this flaw to elevate their privileges on the system.

Detection Guidance

This vulnerability involves an out-of-bounds read in Windows Spaceport.sys. Detection typically requires analyzing system logs for unusual privilege escalation events or monitoring for crashes in the Spaceport.sys driver. Use Event Viewer to check for application or system crashes related to Spaceport.sys. Additionally, enable driver verifier to monitor for memory corruption issues in the driver.

Impact Analysis

If exploited, this vulnerability allows an attacker to gain higher-level permissions on your system, potentially enabling them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability allows local privilege escalation through an out-of-bounds read in Windows Spaceport.sys. While not directly impacting GDPR or HIPAA compliance, such vulnerabilities could enable unauthorized access to sensitive data, potentially violating confidentiality requirements in these regulations if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Spaceport.sys vulnerability. Monitor Microsoft's update guide for specific patches and install them as soon as possible.

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