CVE-2025-8302: Realtek Wi-Fi USB Driver

High severity, CVSS 8.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Realtek rtl81xx SDK Wi-Fi Driver rtwlanu Heap-based Buffer Overflow Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Realtek rtl81xx SDK Wi-Fi driver. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the N6CSet_DOT11_CIPHER_DEFAULT_KEY function. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-26553.

Affected products

• Realtek Wi-Fi USB Driver: before 1030.52.0325.2025 (fixed in 1030.52.0325.2025)

Published 2025-09-02. Last modified 2026-06-17.