CVE-2025-32715: CWE-125: Out-of-bounds Read in Microsoft Windows App Client for Windows Desktop
Out-of-bounds read in Remote Desktop Client allows an unauthorized attacker to disclose information over a network.
AI Analysis
Technical Summary
CVE-2025-32715 is a security vulnerability classified as an out-of-bounds read (CWE-125) found in the Microsoft Windows App Client for Windows Desktop, specifically affecting version 1.00. This vulnerability arises when the Remote Desktop Client improperly handles memory boundaries, allowing an attacker to read data outside the intended buffer limits. Exploitation of this flaw enables an unauthorized attacker to disclose sensitive information over a network without requiring prior authentication, though user interaction is necessary to trigger the vulnerability. The vulnerability has a CVSS v3.1 base score of 6.5, indicating a medium severity level. The attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), but requires user interaction (UI:R). The impact primarily affects confidentiality (C:H), with no impact on integrity or availability. The scope remains unchanged (S:U), meaning the vulnerability affects only the vulnerable component and does not extend to other components or systems. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was reserved in April 2025 and published in June 2025. The flaw could allow attackers to extract sensitive information from the memory of the Remote Desktop Client, potentially exposing credentials, session tokens, or other confidential data during remote desktop sessions. Given the nature of Remote Desktop Client usage, this vulnerability could be leveraged in targeted attacks or phishing campaigns where users are tricked into initiating a malicious remote desktop connection or interacting with crafted content that triggers the out-of-bounds read.
Potential Impact
For European organizations, this vulnerability poses a significant risk to confidentiality, especially for enterprises relying heavily on Remote Desktop Protocol (RDP) for remote access and teleworking, which is prevalent across Europe. Sensitive corporate data, intellectual property, and personal data protected under GDPR could be exposed if attackers exploit this flaw. The medium severity rating suggests that while the vulnerability is not immediately critical, it could be leveraged in sophisticated attacks that bypass other security controls. Organizations in sectors such as finance, healthcare, government, and critical infrastructure, which frequently use remote desktop solutions for administrative access, are particularly at risk. The requirement for user interaction means social engineering or phishing could be used to induce exploitation, increasing the threat surface. Additionally, the lack of a patch at the time of publication means organizations must rely on interim mitigations to reduce exposure. The confidentiality breach could lead to regulatory penalties under GDPR if personal data is compromised, reputational damage, and potential lateral movement by attackers within corporate networks.
Mitigation Recommendations
European organizations should implement the following specific mitigations: 1) Restrict and monitor Remote Desktop Client usage strictly to trusted users and devices, employing network segmentation to limit exposure. 2) Enforce multi-factor authentication (MFA) for all remote desktop access to reduce the risk of unauthorized access even if credentials are exposed. 3) Educate users about phishing and social engineering tactics that could prompt them to initiate malicious remote desktop sessions. 4) Utilize endpoint detection and response (EDR) solutions to monitor for anomalous remote desktop client behaviors indicative of exploitation attempts. 5) Apply network-level protections such as VPNs and firewall rules to restrict RDP traffic to known IP addresses and block unauthorized inbound connections. 6) Regularly update and patch Windows systems and monitor Microsoft security advisories for the release of an official patch for this vulnerability. 7) Consider disabling or limiting the use of the affected Windows App Client version 1.00 until a patch is available, or use alternative remote access solutions with a better security posture. 8) Conduct vulnerability scanning and penetration testing focused on remote desktop services to identify and remediate potential exploitation vectors.
Affected Countries
Germany, France, United Kingdom, Netherlands, Italy, Spain, Poland, Sweden, Belgium, Ireland
CVE-2025-32715: CWE-125: Out-of-bounds Read in Microsoft Windows App Client for Windows Desktop
Description
Out-of-bounds read in Remote Desktop Client allows an unauthorized attacker to disclose information over a network.
AI-Powered Analysis
Technical Analysis
CVE-2025-32715 is a security vulnerability classified as an out-of-bounds read (CWE-125) found in the Microsoft Windows App Client for Windows Desktop, specifically affecting version 1.00. This vulnerability arises when the Remote Desktop Client improperly handles memory boundaries, allowing an attacker to read data outside the intended buffer limits. Exploitation of this flaw enables an unauthorized attacker to disclose sensitive information over a network without requiring prior authentication, though user interaction is necessary to trigger the vulnerability. The vulnerability has a CVSS v3.1 base score of 6.5, indicating a medium severity level. The attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), but requires user interaction (UI:R). The impact primarily affects confidentiality (C:H), with no impact on integrity or availability. The scope remains unchanged (S:U), meaning the vulnerability affects only the vulnerable component and does not extend to other components or systems. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was reserved in April 2025 and published in June 2025. The flaw could allow attackers to extract sensitive information from the memory of the Remote Desktop Client, potentially exposing credentials, session tokens, or other confidential data during remote desktop sessions. Given the nature of Remote Desktop Client usage, this vulnerability could be leveraged in targeted attacks or phishing campaigns where users are tricked into initiating a malicious remote desktop connection or interacting with crafted content that triggers the out-of-bounds read.
Potential Impact
For European organizations, this vulnerability poses a significant risk to confidentiality, especially for enterprises relying heavily on Remote Desktop Protocol (RDP) for remote access and teleworking, which is prevalent across Europe. Sensitive corporate data, intellectual property, and personal data protected under GDPR could be exposed if attackers exploit this flaw. The medium severity rating suggests that while the vulnerability is not immediately critical, it could be leveraged in sophisticated attacks that bypass other security controls. Organizations in sectors such as finance, healthcare, government, and critical infrastructure, which frequently use remote desktop solutions for administrative access, are particularly at risk. The requirement for user interaction means social engineering or phishing could be used to induce exploitation, increasing the threat surface. Additionally, the lack of a patch at the time of publication means organizations must rely on interim mitigations to reduce exposure. The confidentiality breach could lead to regulatory penalties under GDPR if personal data is compromised, reputational damage, and potential lateral movement by attackers within corporate networks.
Mitigation Recommendations
European organizations should implement the following specific mitigations: 1) Restrict and monitor Remote Desktop Client usage strictly to trusted users and devices, employing network segmentation to limit exposure. 2) Enforce multi-factor authentication (MFA) for all remote desktop access to reduce the risk of unauthorized access even if credentials are exposed. 3) Educate users about phishing and social engineering tactics that could prompt them to initiate malicious remote desktop sessions. 4) Utilize endpoint detection and response (EDR) solutions to monitor for anomalous remote desktop client behaviors indicative of exploitation attempts. 5) Apply network-level protections such as VPNs and firewall rules to restrict RDP traffic to known IP addresses and block unauthorized inbound connections. 6) Regularly update and patch Windows systems and monitor Microsoft security advisories for the release of an official patch for this vulnerability. 7) Consider disabling or limiting the use of the affected Windows App Client version 1.00 until a patch is available, or use alternative remote access solutions with a better security posture. 8) Conduct vulnerability scanning and penetration testing focused on remote desktop services to identify and remediate potential exploitation vectors.
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Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-04-09T20:06:59.966Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 68487f501b0bd07c39389ada
Added to database: 6/10/2025, 6:54:08 PM
Last enriched: 7/17/2025, 9:04:18 PM
Last updated: 8/3/2025, 12:37:27 AM
Views: 17
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