CVE-2026-42906: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in Microsoft Windows 10 Version 21H2
CVE-2026-42906 is a vulnerability in Microsoft Windows 10 Version 21H2 where sensitive information can be exposed to an unauthorized local actor via the Windows Shell. The issue allows an authorized attacker with local access to disclose sensitive information without user interaction. An official fix is available from Microsoft to address this vulnerability.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42906) involves an exposure of sensitive information (CWE-200) in the Windows Shell component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). An attacker with local privileges and low complexity can exploit this issue to disclose information without impacting integrity or availability. The vulnerability has a CVSS 3.1 base score of 5.5 (medium severity) and has been officially fixed by Microsoft as per their security advisory.
Potential Impact
The vulnerability allows an authorized local attacker to disclose sensitive information, potentially leading to information leakage. There is no impact on system integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42906 to remediate this vulnerability.
CVE-2026-42906: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in Microsoft Windows 10 Version 21H2
Description
CVE-2026-42906 is a vulnerability in Microsoft Windows 10 Version 21H2 where sensitive information can be exposed to an unauthorized local actor via the Windows Shell. The issue allows an authorized attacker with local access to disclose sensitive information without user interaction. An official fix is available from Microsoft to address this vulnerability.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42906) involves an exposure of sensitive information (CWE-200) in the Windows Shell component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). An attacker with local privileges and low complexity can exploit this issue to disclose information without impacting integrity or availability. The vulnerability has a CVSS 3.1 base score of 5.5 (medium severity) and has been officially fixed by Microsoft as per their security advisory.
Potential Impact
The vulnerability allows an authorized local attacker to disclose sensitive information, potentially leading to information leakage. There is no impact on system integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42906 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.968Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42906","vendor":"Microsoft"}]
Threat ID: 6a284cc08dd33fbd856646e5
Added to database: 6/9/2026, 5:26:24 PM
Last enriched: 6/9/2026, 11:12:02 PM
Last updated: 6/10/2026, 4:28:01 AM
Views: 4
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