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mediumDefenderMicrosoft Defender for Office 365updatem365_message_center · Oct 7, 2026
Microsoft Defender for Office 365: Post-delivery protection for malicious QR codes in Microsoft Teams
Microsoft Defender for Office 365 is updating its protection to detect and respond to malicious URLs embedded in QR codes within Microsoft Teams, enhancing security against increasingly common attack vectors.
“Services: Microsoft Defender XDR. <p><b>[What and why]</b></p><p>We're extending Microsoft Teams URL protection in Microsoft Defender for Office 365 to detect and respond to malicious URLs embedded in QR codes. As attackers increasingly use QR codes to conceal malicious destinations, this update helps protect users b…”
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threat_protectionendpoint_security
Audience
adminsecurity_engineer
Environment
cloud
Classification confidence: 90%
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