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We round up everything Xiaomi announced at its Mobile World Congress event.

The U.S. cybersecurity agency’s acting director Madhu Gottumukkala will be replaced, after a year of cuts, layoffs, and staff reassignments, and allegations of security lapses and claims he struggled to lead the agency.

The U.S. government and its allies said hackers have been exploiting the newly identified bug in Cisco networking gear around the world for years, and urged organizations to patch.

Apply to speak at TechCrunch Founder Summit 2026 by April 17 for a chance to lead a roundtable or breakout session for 1,000 founders and investors. If you’ve built, backed, or operated inside high-growth startups, your experience could shape how the next wave of founders scales.

In the four years since Russia’s full-scale invasion of their country, Ukrainian startups have done more than survive: they are still building and growing.

5 days to save up to $680 on your TechCrunch Disrupt 2026 ticket. These lowest rates of the year disappear on February 27 at 11:59 p.m. PT. Register here.

China’s brain-computer interface industry is rapidly scaling from research to commercialization, driven by strong policy support, expanding clinical trials, and growing investor interest.

As generative AI evolves, a Google VP warns that LLM wrappers and AI aggregators face mounting pressure, with shrinking margins and limited differentiation threatening their long-term viability.

Meta said it’s shifting focus for Horizons Worlds to be “almost exclusively mobile” and that it will separate its Quest VR platform from the virtual world.

OpenAI is reportedly getting close to closing a $100 billion deal, with backers including Amazon, Nvidia, SoftBank, and Microsoft. The deal would value the ChatGPT-maker at $850 billion.