Vulnerabilities
Products Security index
Vulnerabilities
CVE-2025-70616
A stack buffer overflow vulnerability exists in the Wincor Nixdorf wnBios64.sys kernel driver (version 1.2.0.0) in the IOCTL handler for code 0x80102058. The vulnerability is caused by missing bounds checking on the user-controlled Options parameter before copying data into a 40-byte stack buffer (Src[40]) using memmove. An attacker with local access can exploit this vulnerability by sending a crafted IOCTL request with Options > 40, causing a stack buffer overflow that may lead to kernel code execution, local privilege escalation, or denial of service (system crash). Additionally, the same IOCTL handler can leak kernel addresses and other sensitive stack data when reading beyond the buffer boundaries.
CVE-2025-5555
Nixdorf Wincor PORT IO Driver IOCTL wnport.sys sub_11100 stack-based overflow
CVE-2024-46916
Diebold Nixdorf Vynamic Security Suite through 4.3.0 SR06 contains functionality that allows the removal of critical system files before the filesystem is properly mounted (e.g., leveraging a delete call in /etc/rc.d/init.d/mountfs to remove the /etc/fstab file). This can allow code execution and, in some versions, enable recovery of TPM Disk Encryption keys and decryption of the Windows system partition.
CVE-2024-46917
Diebold Nixdorf Vynamic Security Suite through 4.3.0 SR01 does not validate file attributes or the contents of /root during integrity validation. This allows code execution, recovery of TPM Disk Encryption keys, decryption of the Windows system partition, and full control of the Windows OS, e.g., through ~/.profile changes.
CVE-2024-45246
Diebold Nixdorf – CWE-427: Uncontrolled Search Path Element
