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uefi security

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UEFI security on WindowsForum.com covers firmware-level vulnerabilities and boot-chain protections that matter for enterprise IT and industrial environments. Recent discussions highlight PixieFail network-stack flaws in ABB B&R industrial PCs, which allow remote code execution or denial of service via UEFI network boot. Another thread examines CVE-2026-0390, a Secure Boot bypass that undermines the Windows boot trust chain, emphasizing the risk to endpoint hardening. A third topic addresses CVE-2026-23352, a low-level UEFI memory management issue in Windows x86 that affects the transition between firmware and OS kernel. These posts collectively show that UEFI security involves not just firmware updates but also understanding how boot-time protections can be weakened in real-world deployments.
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    CISA Warns ABB B&R Industrial PCs: PixieFail UEFI Network Vulnerabilities (2026)

    CISA republished ABB’s advisory for B&R industrial PCs on May 21, 2026, warning that multiple xPC firmware versions remain exposed to nine PixieFail UEFI network-stack vulnerabilities that can let a network attacker trigger code execution, denial of service, DNS cache poisoning, or data...
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    • cisa advisory industrial pcs pre-boot networking uefi security
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    • Forum: Security Alerts
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    CVE-2026-0390 Secure Boot Bypass: Protect Windows Boot Trust Chain

    Microsoft’s CVE-2026-0390 is another reminder that Secure Boot is only as strong as the trust chain behind it. The vulnerability, described by Microsoft as a UEFI Secure Boot security feature bypass, affects the Windows Boot Loader and is framed as a local issue that could let an authorized...
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    • cve-2026-0390 secure boot uefi security windows boot loader
    • Replies: 0
    • Forum: Security Alerts
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    CVE-2026-23352: Deferring UEFI Boot Services Memory Fix in Windows x86

    Microsoft’s CVE-2026-23352 advisory points to a low-level but strategically important UEFI/boot-path issue in the Windows x86 firmware stack, and the key fix — deferring the freeing of boot services memory — suggests the bug sits squarely in the messy transition between firmware-controlled...
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    • boot services memory cve-2026-23352 uefi security windows boot
    • Replies: 0
    • Forum: Security Alerts
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