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Windows 10 1809 EUVDEUVD-2026-73446

| CVE-2026-69315 MEDIUM
Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-497)
2026-09-08 secure@microsoft.com GHSA-xwx4-frfj-3gh5
Information Disclosure Microsoft Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 23h2 Windows 11 24h2 Windows 11 25h2 Windows 11 26h1 Windows Server 2019 Windows Server 2022 Windows Server 2025
5.5
CVSS 3.1 · Vendor: microsoft
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Vulnerability Assessment

Weakness
CWE
CWE-497
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection System info exposure prevention
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 09, 2026

Windows License Manager on multiple Windows 10, 11, and Server editions exposes sensitive system licensing data to locally authenticated low-privileged users due to CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere). An attacker with an existing local session can read confidential licensing information — such as activation data, product identifiers, or licensing metadata — without authorization. No public exploit code and no CISA KEV listing have been identified; vendor patches are available for all affected versions, reducing urgency for patched environments.

Affected VersionsENISA

Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.7725
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.9445
Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.9445
Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.7582
Windows 10 Version 22H2 10.0.19045.0 <10.0.19045.7725
Windows 10 Version 1809 10.0.17763.0 <10.0.17763.9245
Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.9245
Windows Server 2022 10.0.20348.0 <10.0.20348.5622
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.33438
Windows 11 version 26H1 10.0.28000.0 <10.0.28000.2954
Windows Server 2025 10.0.26100.0 <10.0.26100.33438
Windows Server 2019 10.0.17763.0 <10.0.17763.9245

Affected Packages

euvd windows_10_version_1809 fix: 10.0.17763.9245
euvd windows_10_version_21h2 fix: 10.0.19044.7725
euvd windows_10_version_22h2 fix: 10.0.19045.7725
euvd windows_11_version_23h2 fix: 10.0.22631.7582
euvd windows_11_version_24h2 fix: 10.0.26100.9445
euvd windows_11_version_25h2 fix: 10.0.26200.9445
euvd windows_11_version_26h1 fix: 10.0.28000.2954
euvd windows_server_2019 fix: 10.0.17763.9245
euvd windows_server_2019_server_core_installation fix: 10.0.17763.9245
euvd windows_server_2022 fix: 10.0.20348.5622
euvd windows_server_2025 fix: 10.0.26100.33438
euvd windows_server_2025_server_core_installation fix: 10.0.26100.33438

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 12 packages in euvd

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Severity by source

Vendor (microsoft) PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Sep 08, 2026 - 18:35 EUVD
CVE Published
Sep 08, 2026 - 18:18 cve.org
MEDIUM 5.5

DescriptionCVE.org

Exposure of sensitive system information to an unauthorized control sphere in Windows License Manager allows an authorized attacker to disclose information locally.

Threat Intelligence Overview

EPSS Score
0.5%
Top 61% exploitable
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:Exploitation Less Likely
Data Quality
5 sources
Confidence: Medium
EUVD 🇯🇵JVN NVD CVE.org EPSS Vulnrichment MSRC

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.5%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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Same weakness CWE-497 – Exposure of Sensitive System Information to an Unauthorized Control Sphere

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References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-69315 REF https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69315

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