The Vulnerability Details
A recently patched security flaw in Microsoft Teams for Android could let an attacker with local access spoof trusted elements within the application. The issue originates from improperly restricted file and directory permissions, which allow an external party to access or manipulate resources in a way that impersonates legitimate components. An attacker who gains local access to a device could exploit this to deceive users into trusting malicious communications or content that appears authentic.
While the attack requires user interaction and is limited to a local vector, the potential impact on data confidentiality is rated High. The vulnerability carries a CVSS 3.1 base score of 5.5, with an adjusted environmental score of 4.8, and has been classified as Important by Microsoft. No privileges are needed to exploit the flaw, lowering the barrier for an attacker in a shared or compromised environment.
Patch and Impact
Microsoft released a fix as part of its May 2026 Patch Tuesday updates, addressing the issue in Teams for Android build 1.0.0.2026092103. Users must install the update through the Google Play Store to secure their devices. The exploit has not been publicly disclosed or actively exploited, and Microsoft assesses exploitation as less likely. Security researcher Ofek Levin from Enclave is credited with responsible disclosure.
Enterprise environments relying on Microsoft Teams for sensitive communications should move quickly to apply the patch. While the current threat level is low, the local attack surface means that organizations with shared or high security environments face elevated risk until the update is deployed.
Source: Cyber Security News
