Nintendo released firmware 23.0.0 to fix CVE-2026-82079, a high-severity stack-based buffer overflow in the original Nintendo Switch local wireless networking stack. A nearby attacker who scans a QR code displayed during the Album Send to Smartphone workflow—or the equivalent function in Mario Kart Live: Home Circuit—could join the temporary wireless environment and send crafted packets to execute unauthorized code or access console data.
The issue affects original Switch consoles running firmware earlier than 23.0.0; Nintendo Switch 2 is not affected. Nintendo said it had no evidence of exploitation in the wild as of September 10 and advised users unable to update immediately to avoid displaying affected QR codes publicly and restrict nearby access while using vulnerable features.

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Nintendo published an advisory for CVE-2026-82079, affecting original Switch consoles running firmware earlier than 23.0.0. The company said external security researchers reported the flaw and that it had no evidence of in-the-wild exploitation as of that date.
Nintendo released system update 23.0.0 to remediate CVE-2026-82079, a high-severity stack-based buffer overflow in the original Nintendo Switch local wireless networking code.
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