Weekly Cyber Security News 15/01/2026

Let’s catch up on the more interesting vulnerability disclosures and cyber security news gathered from articles across the web this week. This is what we have been reading about on our coffee break!

You might want to get on to this… 

• Windows info-disclosure 0-day bug gets a fix as CISA sounds alarm

Copilot isn’t getting much love at the moment from what I’ve seen around. This is really going to add to the backlash:

• Reprompt attack let hackers hijack Microsoft Copilot sessions

Yes… No… Maybe… Perhaps not… 

• Instagram denies breach amid claims of 17 million account data leak