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A logo sits illuminated outside the Microsoft booth on day 2 of the GSMA Mobile World Congress 2019 on February 26, 2019 in Barcelona, Spain. Getty Images

Researchers Find 670+ Microsoft Subdomains Vulnerable to Takeover

The now-fixed flaw could have enabled attackers to trick users into downloading malicious content or sharing credentials.

Security researchers discovered more than 670 Microsoft subdomains vulnerable to account takeover, potentially giving attackers the ability to trick users into sharing their usernames and passwords or downloading malicious files.

Subdomain takeover occurs when a subdomain can be controlled by anyone other than system admins, explain Numan Ozdemir and Ozan Agdepe of security alert service Vullnerability, in a blog post. This can happen due to expired hosting services or DNS misconfigurations, and it can allow an adversary to upload files, create databases, track data traffic, or create a clone of a primary website. If a subdomain seems legitimate, users will likely enter their information.

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