CVE-2026-83507
Awaiting Analysis Awaiting Analysis - Queue

Improper Link Resolution Leading to Local Information Disclosure in Windows Update Orchestrator Service

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
Improper link resolution before file access ('link following') in Windows Update Orchestrator Service allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-83507
EUVD
EUVD-2026-99905

Affected Vendors & Products

Showing 11 associated CPEs
Vendor Product Version / Range
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 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-59 The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability involves improper link resolution in the Windows Update Orchestrator Service. An authorized attacker can exploit this to follow symbolic links and access files they shouldn't, leading to local information disclosure.

Impact Analysis

An attacker with local access could exploit this to read sensitive files on your system, potentially exposing personal data, credentials, or other confidential information.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or health data, violating GDPR or HIPAA requirements for data protection and confidentiality.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Update Orchestrator Service vulnerability. Monitor Microsoft's security advisories for patches and install them promptly.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-83507. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart