CVE-2025-49731 is a vulnerability identified in Microsoft Teams for Android, specifically version 1.0.0. The issue stems from improper handling of insufficient permissions or privileges, classified under CWE-280. This weakness allows an authorized attacker—meaning someone who already has some level of access—to elevate their privileges over a network. The vulnerability does not require user interaction and can be exploited remotely (network attack vector), but it demands a high level of attack complexity and the attacker must have low privileges initially. The vulnerability impacts confidentiality to a limited extent, with no direct impact on integrity or availability. The CVSS 3.1 base score is 3.1, indicating a low severity level. The flaw arises because the application fails to correctly enforce permission checks, potentially allowing an attacker to perform actions or access resources beyond their authorized scope. No known exploits are currently reported in the wild, and no patches or fixes have been linked yet. The vulnerability affects only the initial release version 1.0.0 of Microsoft Teams for Android, which may limit its exposure as newer versions presumably address this issue. Given the nature of the vulnerability, it is primarily a privilege escalation risk within the context of the app's operational environment on Android devices.

For European organizations, the impact of CVE-2025-49731 is relatively limited but still notable. Microsoft Teams is widely used across Europe for business communication and collaboration, including by enterprises, public sector entities, and educational institutions. An attacker exploiting this vulnerability could gain elevated privileges within the Teams app on Android devices, potentially accessing sensitive communication data or performing unauthorized actions within the app. However, since the vulnerability requires the attacker to be already authorized with low privileges and has a high attack complexity, the risk of widespread exploitation is low. The limited confidentiality impact means that while some data exposure is possible, it is unlikely to lead to severe data breaches or operational disruptions. Organizations with large mobile workforces relying on Android devices for Teams access should be aware of this risk, especially if they have not updated beyond version 1.0.0. The absence of known exploits reduces immediate threat levels, but the potential for privilege escalation could be leveraged in targeted attacks or combined with other vulnerabilities for more significant impact.

To mitigate CVE-2025-49731, European organizations should take the following specific actions: 1) Ensure all Android devices running Microsoft Teams are updated to the latest version beyond 1.0.0, as newer releases are likely to have addressed this vulnerability. 2) Implement strict mobile device management (MDM) policies that enforce app version controls and restrict installation of outdated or unpatched applications. 3) Limit the privileges assigned to users within Microsoft Teams, applying the principle of least privilege to reduce the impact of any privilege escalation. 4) Monitor network traffic and application logs for unusual activities that might indicate attempts to exploit privilege escalation vulnerabilities. 5) Educate users about the importance of applying updates promptly and recognizing suspicious behavior within collaboration tools. 6) Coordinate with Microsoft support channels to obtain patches or workarounds if available and apply them promptly. These steps go beyond generic advice by focusing on version control, privilege management, and proactive monitoring tailored to this specific vulnerability context.