Microsoft Teams Vulnerability Allows Hackers to Perform Spoofing Attacks

A newly discovered security flaw in Microsoft Teams for Android could allow attackers to carry out dangerous spoofing attacks.

By exploiting improperly secured files, hackers can trick users and compromise sensitive corporate information.

Microsoft has rapidly issued an official security update to address the vulnerability before malicious actors can weaponize it against organizations.

Microsoft Teams Spoofing Flaw

Tracked officially as CVE-2026-32185, this vulnerability carries an “Important” severity rating from Microsoft and a CVSS 3.1 base score of 5.5.

The root cause of the flaw is CWE-552, which occurs when files or directories are left exposed and accessible to unauthorized external parties.

This specific weakness strictly impacts the Android version of the Microsoft Teams communication platform.

To exploit this bug successfully, an attacker must have local access to the target device. Furthermore, the exploit requires active user interaction.

This means hackers cannot simply breach a mobile device remotely over the internet. Instead, they must trick a legitimate user into taking a specific action on a device where the attacker has already gained local presence.

When successfully triggered, the vulnerability results in a “High” impact on confidentiality, allowing the attacker to view restricted data.

While the confidentiality risks are severe, the vulnerability does not impact the integrity or availability of the application.

An attacker cannot use this flaw to delete files, alter messages, or crash the Microsoft Teams service.

However, they can use the exposed files to execute spoofing attacks. In a corporate environment, spoofing involves an attacker impersonating a trusted user or service, which can be highly effective for stealing sensitive information or further compromising user credentials.

Fortunately for organizations, Microsoft currently rates the exploitability of this flaw as “Less Likely.”

There are no known instances of this vulnerability being actively exploited by hackers in the wild.

Additionally, no public exploit code has been disclosed. The flaw was responsibly identified and reported to Microsoft by security researcher Ofek Levin from Enclave.

Because this vulnerability relies on local file access, mitigating the threat requires users to patch their local software directly.

Microsoft released an official fix on May 12, 2026, urging customers to apply the patch immediately.

Users running Microsoft Teams for Android must navigate to the Google Play Store to download the latest security update.

Updating the application to build 1.0.0.2026092103 or later will resolve the exposed directory weakness.

Cybersecurity teams should actively remind remote employees to update their mobile communication applications to prevent potential spoofing threats.

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