PT-2025-35609 · Realtek · Rtl8811Au

Dungnm · Published 2025-09-02 · Updated 2025-09-03 · CVE-2025-8301

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Realtek RTL8811AU drivers (affected versions not specified)

Description The Realtek RTL8811AU driver contains a heap-based buffer overflow in the N6CSet DOT11 CIPHER DEFAULT KEY function. This flaw occurs due to insufficient validation of user-supplied data length before copying it into a fixed-size heap buffer. Successful exploitation allows a local attacker to escalate privileges and execute arbitrary code with SYSTEM-level privileges. Exploitation requires the attacker to first have the ability to execute code on the target system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2025-8301

ZDI-25-880

Affected Products

Rtl8811Au

References · 5

• https://zerodayinitiative.com/advisories/ZDI-25-880 · Security Note
• https://osv.dev/vulnerability/CVE-2025-8301 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-8301 · Security Note
• https://twitter.com/CVEnew/status/1962976544197947458 · Twitter Post
• https://t.me/CVEtracker/31511 · Telegram Post