Heap-based buffer overflow in rtl81xx SDK - CVE-2025-8299
Published: September 3, 2025
Vulnerability identifier: #VU114751
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-8299
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Realtek
Affected software:
rtl81xx SDK
rtl81xx SDK
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the MgntActSet_TEREDO_SET_RS_PACKET function. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system with elevated privleges.
How to mitigate CVE-2025-8299
Install updates from vendor's website.