Microsoft Teams Vulnerability Enables Spoofing Attacks

A newly disclosed security vulnerability in Microsoft Teams could enable attackers to spoof local devices. This flaw raises significant concern for both enterprises and individual users relying on the platform for daily communications.

Microsoft disclosed CVE-2026-32185 on May 12, 2026, as part of its coordinated May 2026 Patch Tuesday Vulnerability 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, allowing them to deceive users into trusting malicious content or communications that appear legitimate.

While the attack requires user interaction and is limited 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 rated Important in severity by Microsoft.

Notably, no privileges are required to exploit the vulnerability, lowering the barrier for a motivated attacker operating in 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 remediation level is marked as Official Fix, meaning a patch is already available.

The vulnerability specifically affects Microsoft Teams for Android, with the patched build number listed as 1.0.0.2026092103. Users are required to take action to apply the update available through the Google Play Store.

Patch and Mitigation

Microsoft has released a security update for Microsoft Teams for Android via the Google Play Store. Users and administrators are strongly encouraged to update to the latest build immediately to mitigate exposure.

Security researcher Ofek Levin from Enclave is credited with responsibly disclosing the vulnerability to Microsoft through coordinated disclosure.

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

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