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CriticalSupply chainOct 28, 2026

Flaw in Server Boot Firmware Allows Attackers to Hijack Systems

A critical vulnerability has been uncovered in common server firmware that allows attackers to run unauthorized code before the operating system loads. The flaw affects machines while they are booting over a network, effectively bypassing Secure Boot defences. If exploited, an attacker on the network can gain deep, persistent control over the server.

Supply chain security briefing

Who is affected

Organisations operating servers or endpoints that rely on EDK II-based UEFI firmware and boot over the network are at risk.

How to mitigate it

  1. 1Disable network booting in the system BIOS or UEFI settings on all devices where it is not actively needed.
  2. 2Restrict and segment network access so unauthorized devices cannot communicate with servers during boot processes.
  3. 3Monitor hardware vendor advisories and apply official firmware and BIOS updates as soon as they become available.

How Outsource IT solves this

Outsource IT proactively manages critical firmware patching, audits device boot configurations, and secures underlying server infrastructure.

Managed IT Services

Tags

UEFIFirmwareServer SecurityVulnerability

Source advisory: the-hacker-news

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