Microsoft this week released a record number of security patches for Windows, Office and other technology product lines, citing the use of artificial intelligence to help discover code vulnerabilities.

The technology and cloud giant issued patches for 570 security flaws on Tuesday as part of its scheduled monthly release of fixes, which security researchers have long dubbed “Patch Tuesday.”

At least two of the vulnerabilities are classified as zero-day, meaning they were exploited before Microsoft was aware of them. A bug affecting Windows Server allows hackers to escalate your privileges from a limited user to a system administrator. Another bug affects the SharePoint file-sharing server: the US government’s cybersecurity agency, CISA, warned that hackers were actively exploiting the bug to compromise organizations.

Krebs on Security was the first to report the news.

The big patch update comes a week after Microsoft said in a blog post that it expected its usual batch of monthly security patches to be much larger than before. The company cited the use of AI to help its employees discover previously undiscovered security flaws in its software.

“As AI helps defenders uncover more issues, customers will see a greater volume of security updates included in each security release,” said Windows chief Pavan Davuluri.

As AI models become more advanced and focused on cybersecurity issues, security researchers are using them to discover vulnerabilities that may have been latent in software code for years, if not longer. Parts of Microsoft’s Windows code date back decades.