CVE-2025-8301 Details
Description
Realtek RTL8811AU rtwlanu.sys N6CSet_DOT11_CIPHER_DEFAULT_KEY Heap-based Buffer Overflow Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Realtek RTL8811AU drivers. 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-24786.
A heap-based buffer overflow vulnerability has been identified in the Realtek RTL8811AU wireless driver, specifically within the rtwlanu.sys file. This vulnerability allows local attackers to escalate privileges on affected systems. The issue arises in the N6CSet_DOT11_CIPHER_DEFAULT_KEY function, where user-supplied data is not properly validated before being copied to a fixed-length heap-based buffer. As a result, an attacker with access to low-privileged code can exploit this vulnerability to execute arbitrary code with SYSTEM privileges.
Users are advised to update to version 1030.44.1204.2024, available on the Realtek website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Sep 3, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-25-880/ | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| realtek wi-fi usb driver | < 1030.52.0325.2025 |
CPE
Remediation
| |
| realtek rtl8811au | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Sep 10, 2025 | Initial Analysis | [email protected] |
| Sep 2, 2025 | New CVE Received | [email protected] |