CVE-2026-56171: CWE-359: Exposure of Private Personal Information to an Unauthorized Actor in Microsoft Remote Desktop Web Client
Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-56171) affects Microsoft Remote Desktop Web Client version 2.0.0.0 and involves the exposure of private personal information to unauthorized actors over a network. It is categorized as CWE-359, which pertains to the exposure of sensitive information to unauthorized entities. The CVSS v3.1 base score is 7.1, reflecting a high severity with network attack vector, low attack complexity, no privileges required, and user interaction required. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
An attacker without privileges can cause disclosure of private personal information over the network via the vulnerable Remote Desktop Web Client. The confidentiality impact is high, while integrity impact is low and availability is not affected. This could lead to unauthorized access to sensitive user data.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56171 to remediate this vulnerability.
CVE-2026-56171: CWE-359: Exposure of Private Personal Information to an Unauthorized Actor in Microsoft Remote Desktop Web Client
Description
Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.
CVSS v3.1
Score 7.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-56171) affects Microsoft Remote Desktop Web Client version 2.0.0.0 and involves the exposure of private personal information to unauthorized actors over a network. It is categorized as CWE-359, which pertains to the exposure of sensitive information to unauthorized entities. The CVSS v3.1 base score is 7.1, reflecting a high severity with network attack vector, low attack complexity, no privileges required, and user interaction required. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
An attacker without privileges can cause disclosure of private personal information over the network via the vulnerable Remote Desktop Web Client. The confidentiality impact is high, while integrity impact is low and availability is not affected. This could lead to unauthorized access to sensitive user data.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56171 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-19T13:53:31.989Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56171","vendor":"Microsoft"}]
Threat ID: 6a5b401834329bf928c71347
Added to database: 07/18/2026, 08:58:00 UTC
Last enriched: 08/17/2026, 13:53:58 UTC
Last updated: 08/31/2026, 22:52:12 UTC
Views: 84
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