Microsoft September 2026 Patch Tuesday fixes nearly a thousand flaws, including two major zero-days

• Microsoft has fixed no fewer than 974 vulnerabilities in its latest Patch Tuesday release
• Two were already being exploited in the wild, 114 categorized as 'Critical'
• AI is to blame for boosting CVE discovery and also intensifying attacks

Microsoft's September 2026 Patch Tuesday has become its biggest security release on record, with the company issuing fixes for a staggering 974 vulnerabilities across the entire stack.

According to the company's release notes, an overwhelming majority (723) of the vulnerabilities addressed related to Windows, with Office coming in at second place with 111 of its own vulnerabilities being addressed.

While it's clear that the number of vulnerabilities is going up year-over-year, it's likely that the company was also simply able to find more of them that would otherwise have slipped through the net thanks to AI-assisted discovery tools.

This is Microsoft's biggest Patch Tuesday ever

Speaking about the September 2026...

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