CVE-2021-35393

CRITICAL

Realtek RTL819x Jungle SDK 2.0-3.4.14b - Unauthenticated Stack Buffer Overflow via UPnP Callback Header

Title source: llm
STIX 2.1

Description

Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a stack buffer overflow vulnerability that is present due to unsafe parsing of the UPnP SUBSCRIBE/UNSUBSCRIBE Callback header. Successful exploitation of this vulnerability allows remote unauthenticated attackers to gain arbitrary code execution on the affected device.

References (3)

Core 3
Core References
Broken Link, Patch, Vendor Advisory x_refsource_misc
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
Broken Link, Exploit, Third Party Advisory x_refsource_misc
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain

Scores

CVSS v3 9.8
EPSS 0.7033
EPSS Percentile 99.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (1)
realtek/rtl819x_jungle_software_development_kit 2.0 - 3.4.14b
Published Aug 16, 2021
Tracked Since Feb 18, 2026