Google will shut down the consumer version of its social network Google after announcing data from up to 500,000 users may have been exposed to external developers by a bug that was present for more than two years in its systems. The company said in a blog that it had discovered and patched the leak in March of this year and had no evidence of misuse of user data or that any developer was aware or had exploited the vulnerability. Shares of its parent company Alphabet Inc, however, were down 1.5 per cent at $1150.75 (£878.71) in response to what was the latest in a run of privacy issues to hit the United States' big tech companies. Google said it had reviewed the issue, looking at the type of data involved, whether it could accurately identify the users to inform, whether there was any evidence of misuse, and whether there were any actions a developer or user could take. "None of these thresholds were met in this instance," it said.