The number of devices on the web using known private keys for HTTPS server certificates has gone up by 40% in the last nine months (3.2 million in November 2015 vs. 4.5 million now) In the spirit of open research we are releasing the raw data today on Github. The data we are publishing consists of 331 certificates including the matching private key as well as 553 individual private keys. We think that any determined attacker can repeat our research and get the private keys from publicly available firmware with ease.”]
Source: https://sec-consult.com/blog/detail/house-of-keys-9-months-later-40-worse/