ZDI-CAN-24786: 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 N6CSetDOT11CIPHERDEFAULTKEY 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.
Other sources
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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2025-8301.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-24786?
The severity of ZDI-CAN-24786 is considered high due to its ability to allow local privilege escalation.
How do I fix ZDI-CAN-24786?
To fix ZDI-CAN-24786, update the Realtek RTL8811AU drivers to the latest version provided by the vendor.
Who is affected by ZDI-CAN-24786?
ZDI-CAN-24786 affects installations of Realtek RTL8811AU drivers in environments where local attackers can execute low-privileged code.
What types of attacks can ZDI-CAN-24786 enable?
ZDI-CAN-24786 can enable local attackers to escalate their privileges on affected systems.
Is there a workaround for ZDI-CAN-24786?
There are no documented workarounds for ZDI-CAN-24786 other than applying the necessary driver updates.