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.
Published: 2025-09-02
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
EUVD EUVD EUVD-2025-26430 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.
History

Wed, 10 Sep 2025 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Realtek rtl8811au
Realtek wi-fi Usb Driver
CPEs cpe:2.3:a:realtek:wi-fi_usb_driver:*:*:*:*:*:windows:*:*
cpe:2.3:h:realtek:rtl8811au:-:*:*:*:*:*:*:*
Vendors & Products Realtek rtl8811au
Realtek wi-fi Usb Driver

Wed, 03 Sep 2025 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Realtek
Realtek realtek Sdk
Vendors & Products Realtek
Realtek realtek Sdk

Wed, 03 Sep 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 02 Sep 2025 20:15:00 +0000

Type Values Removed Values Added
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.
Title Realtek rtl81xx SDK Wi-Fi Driver rtwlanu Heap-based Buffer Overflow Local Privilege Escalation Vulnerability
Weaknesses CWE-122
References
Metrics cvssV3_0

{'score': 8.8, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


Subscriptions

Realtek Realtek Sdk Rtl8811au Wi-fi Usb Driver
cve-icon MITRE

Status: PUBLISHED

Assigner: zdi

Published:

Updated: 2025-09-03T14:32:59.643Z

Reserved: 2025-07-28T23:19:51.945Z

Link: CVE-2025-8300

cve-icon Vulnrichment

Updated: 2025-09-03T14:32:57.427Z

cve-icon NVD

Status : Analyzed

Published: 2025-09-02T20:15:38.863

Modified: 2025-09-10T15:00:11.357

Link: CVE-2025-8300

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-03T20:27:10Z

Weaknesses