CVE-2026-50339: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in Microsoft Windows 10 Version 1809
CVE-2026-50339 is a vulnerability in Microsoft Windows 10 Version 1809 where sensitive information can be exposed to an unauthorized local actor via Windows Push Notifications. The flaw allows an authorized attacker with local access to disclose sensitive data without user interaction. Microsoft has released an official fix to address this issue. The vulnerability has a medium severity rating with a CVSS score of 5.5.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-50339) involves an exposure of sensitive information (CWE-200) in Windows Push Notifications on Windows 10 Version 1809 (build 10.0.17763.0). An attacker with local privileges can exploit this flaw to disclose sensitive information without requiring user interaction. The vulnerability has been assigned a CVSS 3.1 base score of 5.5, indicating medium severity. Microsoft has published an official fix for this issue, as referenced in their security update guide.
Potential Impact
An authorized local attacker can disclose sensitive information due to improper handling in Windows Push Notifications. The confidentiality of data is impacted (high confidentiality impact), but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1809 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50339 for detailed patch information and deployment guidance.
CVE-2026-50339: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in Microsoft Windows 10 Version 1809
Description
CVE-2026-50339 is a vulnerability in Microsoft Windows 10 Version 1809 where sensitive information can be exposed to an unauthorized local actor via Windows Push Notifications. The flaw allows an authorized attacker with local access to disclose sensitive data without user interaction. Microsoft has released an official fix to address this issue. The vulnerability has a medium severity rating with a CVSS score of 5.5.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50339) involves an exposure of sensitive information (CWE-200) in Windows Push Notifications on Windows 10 Version 1809 (build 10.0.17763.0). An attacker with local privileges can exploit this flaw to disclose sensitive information without requiring user interaction. The vulnerability has been assigned a CVSS 3.1 base score of 5.5, indicating medium severity. Microsoft has published an official fix for this issue, as referenced in their security update guide.
Potential Impact
An authorized local attacker can disclose sensitive information due to improper handling in Windows Push Notifications. The confidentiality of data is impacted (high confidentiality impact), but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1809 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50339 for detailed patch information and deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T18:15:10.952Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50339","vendor":"Microsoft"}]
Threat ID: 6a56769168715ace43f08c86
Added to database: 07/14/2026, 17:49:05 UTC
Last enriched: 07/15/2026, 00:33:08 UTC
Last updated: 07/15/2026, 00:33:08 UTC
Views: 2
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