Teams attacks are on the rise

Microsoft Teams has become an attractive environment for attackers lately. The collaboration app is increasingly targeted by malicious actors seeking to spread harmful content.

Why Teams is vulnerable to attack

Teams traffic typically bypasses secure email gateways and benefits from the perceived legitimacy of colleague-initiated chat, making lures particularly effective in this environment.

“Unlike email, Teams traffic typically bypasses secure email gateways and benefits from the perceived legitimacy of a colleague-initiated chat, which can make lures particularly effective in this environment”

Weaponizable File Protection launches

Microsoft rolled out Weaponizable File Protection to Teams in early twenty twenty-six. The tool automatically scanned for potentially dangerous attachments but lacked customization options.

Admins get file type control

Administrators will now customize which file types are blocked in Teams to align with their organization's security requirements or continue using Microsoft-recommended defaults.

“Administrators will be able to customize which file types are blocked in Teams to align with their organization's security requirements or continue using the Microsoft-recommended default list”

November twenty twenty-six rollout planned

Microsoft is aiming for a November twenty twenty-six rollout of the customizable file blocking feature. Admins will gain greater control over which file types are blocked across their organizations.

Broader Teams security upgrades coming

November twenty twenty-six will also bring simultaneous screen sharing for two presenters, breakout room support for Android, and a Meeting Shared Files window for accessing meeting attachments.