Microsoft has identified a critical security flaw in its Teams application for Android devices, designated as CVE-2026-42835. This vulnerability, disclosed on June 9, 2026, could enable authenticated attackers to remotely access sensitive information without user interaction.
The issue arises from improper handling of special elements in the application’s output, leading to potential injection attacks. This flaw has been assigned a CVSS 3.1 base score of 8.1, indicating a high severity level. The vulnerability is exploitable over a network, allowing remote attacks via the internet.
Exploitation of this vulnerability could permit attackers to read portions of heap memory, which may contain sensitive data such as authentication tokens, session information, or cached credentials. Even partial exposure of such data poses significant risks, especially in enterprise settings where Teams is widely used for internal communications and file sharing.
Microsoft has released a security update to address this issue, available through the Google Play Store. Users and administrators are strongly encouraged to update the Teams application promptly to mitigate potential risks.
This incident underscores the importance of regular software updates and vigilant security practices, particularly for applications integral to business operations. Organizations should ensure that all devices running Microsoft Teams for Android are updated to the latest version to maintain a secure communication environment.
