Critical 16-Year-Old UEFI Flaw Can Run Code Before Secure Boot on Network-Booting Servers
The Hacker News · Oct 28, 2026
A critical 16-year-old flaw in EDK II, the open-source code that most hardware makers use to build UEFI firmware, can allow an attacker to run code on a machine before its operating system loads, but only while the machine is booting over the network. UEFI firmware is the software that runs first when a computer is switched on, before the operating system. An attacker who can reach the machine
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