CVE-2026-35159 describes an authentication bypass vulnerability in the BIOS of Dell Inspiron 15 3520 systems. The issue stems from a primary weakness in the authentication process, allowing an attacker with physical access to bypass authentication controls. Exploitation could result in unauthorized information disclosure. The vulnerability has a CVSS v3.1 base score of 5.3, reflecting medium severity with attack vector requiring physical access, high attack complexity, no privileges required, no user interaction, unchanged scope, low confidentiality impact, high integrity impact, and low availability impact. No vendor advisory or patch information is currently available.

An unauthenticated attacker with physical access to the affected Dell Inspiron 15 3520 device could bypass BIOS authentication controls. This may lead to unauthorized disclosure of information and compromise of system integrity. The impact on confidentiality is low, integrity is high, and availability is low according to the CVSS metrics.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, physical access to the device should be restricted to trusted personnel to reduce the risk of exploitation.