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) in Microsoft Remote Desktop Web Client version 2.0.0.0 is classified as CWE-359 (Exposure of Private Personal Information to an Unauthorized Actor). It allows an attacker with network access and no privileges to cause disclosure of sensitive information. The CVSS 3.1 base score is 7.1, indicating high severity, with the attack vector being network-based, low attack complexity, no privileges required, and user interaction required. The impact is high confidentiality loss with limited integrity impact and no availability impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An unauthorized attacker can disclose private personal information over the network via the vulnerable Remote Desktop Web Client, potentially compromising confidentiality of sensitive data. Integrity impact is low and availability is 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 provided patch to Remote Desktop Web Client version 2.0.0.0 as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56171 for detailed remediation instructions.
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) in Microsoft Remote Desktop Web Client version 2.0.0.0 is classified as CWE-359 (Exposure of Private Personal Information to an Unauthorized Actor). It allows an attacker with network access and no privileges to cause disclosure of sensitive information. The CVSS 3.1 base score is 7.1, indicating high severity, with the attack vector being network-based, low attack complexity, no privileges required, and user interaction required. The impact is high confidentiality loss with limited integrity impact and no availability impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An unauthorized attacker can disclose private personal information over the network via the vulnerable Remote Desktop Web Client, potentially compromising confidentiality of sensitive data. Integrity impact is low and availability is 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 provided patch to Remote Desktop Web Client version 2.0.0.0 as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56171 for detailed remediation instructions.
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: 07/18/2026, 08:59:43 UTC
Last updated: 07/18/2026, 11:08:17 UTC
Views: 4
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