A new report highlights the high number of users still operating outdated Windows operating systems and unsupported browsers. This represents a huge threat to the organizations whose users access company networks from insecure laptops and home computers within the growing adoption of BYOD policies.

Duo Security reports that 65% of its clients’ Windows users are still running Vista, and that tens of thousands are still on XP (now 15 years old, unsupported, and with around 700 known vulnerabilities of which 200 are rated as high to critical). On top of this, while Chrome is the most popular browser, 20% of Internet Explorer users are running a version that has reached end-of-life status and do not receive security patches. For the XP users, as many as 88% are still using Internet Explorer 8.