The June updates for Windows address a critical vulnerability (CVE-2025-3052) discovered by security researcher Alex Matrosov that enables attackers to bypass Secure Boot. This flaw allows malicious actors to execute unsigned code early in the boot process, jeopardizing the security chain of trust and providing a pathway for bootkit malware. Such malware is particularly harmful as it operates before the operating system loads, eluding traditional security measures and potentially granting attackers control over the system and access to confidential information. Microsoft designed Secure Boot to thwart this exact risk, making this flaw particularly concerning.
"Attackers can exploit this vulnerability to run unsigned code during the boot process, effectively bypassing Secure Boot and compromising the system's chain of trust."
"Bootkit malware is especially crafty and dangerous. By running before your PC boots up, it's able to skirt past your usual security protection and evade detection."
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