Microsoft Teams Flaw Allows Hackers to Launch Spoofing Attacks

A newly disclosed security vulnerability in Microsoft Teams could allow attackers to spoof local devices, raising serious concerns for enterprises and individual users who rely on the platform for daily communications.

Microsoft disclosed CVE-2026-32185 on May 12, 2026, as part of its coordinated May 2026 Patch Tuesday disclosure process.

The flaw exposes a critical weakness in how Microsoft Teams handles file and directory access, potentially allowing an attacker to manipulate or impersonate trusted elements within the application.

At its core, the vulnerability stems from files or directories in Microsoft Teams being accessible to external parties.

This misconfiguration enables an unauthorized local attacker to perform spoofing attacks, deceiving users into trusting malicious content or communications that appear completely legitimate.

While the attack requires user interaction and is confined to a local attack vector, its potential impact on data confidentiality is rated High, making it a serious concern for sensitive enterprise environments.

The flaw carries a CVSS 3.1 base score of 5.5, with an adjusted environmental score of 4.8, and has been classified as Important in severity by Microsoft.

Notably, no privileges are required to exploit the vulnerability, lowering the barrier for any motivated attacker operating within a shared or compromised local environment.

As of the publication date, the vulnerability has not been publicly disclosed or actively exploited in the wild.

Microsoft’s exploitability assessment categorizes it as “Exploitation Less Likely,” and no proof-of-concept exploit code has been confirmed.

The vulnerability specifically affects Microsoft Teams for Android, with the patched build number listed as 1.0.0.2026092103.

Patch and Mitigation

Microsoft has released a security update for Microsoft Teams for Android via the Google Play Store.

The remediation level is marked as Official Fix, meaning the patch is already available, and users are required to take immediate action to apply it.

Organizations running Microsoft Teams in regulated or high-security environments should prioritize this patch, particularly on mobile endpoints where Teams is actively deployed for business communication.

Administrators managing large Android device fleets should verify patch deployment through their mobile device management (MDM) solutions.

Security researcher Ofek Levin from Enclave is credited with responsibly disclosing the vulnerability to Microsoft through coordinated disclosure, enabling the patch to reach users before any known exploitation occurred.

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