Lenovo Certificate Validation Vulnerabilities

Improper TLS certificate validation in Lenovo Filez (Windows and Android) enables an adjacent-network attacker who can intercept application traffic to present a fraudulent certificate, inject malicious server responses, and achieve arbitrary code execution on the victim's device. Both Windows and Android clients are confirmed affected per NVD CPE data with no version upper bound specified. No public exploit code has been identified and EPSS probability is 0.01%, though the impact if exploitation succeeds is fully classified as high across confidentiality, integrity, and availability.

Lenovo Filez fails to properly validate SSL/TLS certificates, enabling network-positioned attackers to intercept encrypted communications and extract sensitive user information. The vulnerability requires an adjacent network position and specific conditions to exploit, but affects all users of the application. No patch is currently available.