Is CVE-2025-8300 actively exploited?

No active exploitation of CVE-2025-8300 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-8300 be exploited remotely?

No. CVE-2025-8300 requires local access to exploit.

What is the CVSS score of CVE-2025-8300?

CVE-2025-8300 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2025-8300

CWE-122Published: September 2, 2025· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

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-26552.

NVD Source

Technical Analysis

CVE-2025-8300 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.