Microsoft Windows
CVE-2020-0863 — Connected User Experiences and Telemetry Service Information Disclosure Vulnerability
Executive Summary
An information vulnerability exists when Windows Connected User Experiences and Telemetry Service improperly discloses file information. Successful exploitation of the vulnerability could allow the attacker to read any file on the file system. To exploit the vulnerability, an attacker would have to log onto an affected system and run a specially crafted application. The update addresses the vulnerability by changing the way Windows Connected User Experiences and Telemetry Service discloses file information.
Overview
5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.0
EPSS Score
0.01497
probability of exploitation in the next 30 days
0.70862 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
8 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 1903 for 32-bit Systems | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for ARM64-based Systems | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for x64-based Systems | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1909 for 32-bit Systems | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1909 for ARM64-based Systems | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1909 for x64-based Systems | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1903 (Server Core installation) | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1909 (Server Core installation) | 4540673 (Security Update) |
Important | Information Disclosure | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
4540673 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
@edwardzpeng, Clément Labro (@itm4n) - https://itm4n.github.io/, Jarvis_1oop of Pinduoduo Security Research Lab
References
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