Bloomberg did some terrific and deep reporting last week on how private equity debt likely contributed to a series of major compromises at Ivanti at the hands of China-backed hacker groups. They touch on several other examples, but it seems like the list could be quite long at this point.
The guys at the Risky Business podcast have been talking forever about major breaches and code compromises that occurred after various security companies were acquired by private equity firms and loaded with debt. They've argued (correctly, in my book) that when you see this happening with a vendor you use, it's a good signal to find a suitable alternative to whatever that platform does for you.