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CVE-2021-35394

Known Exploited (CISA KEV)CRITICAL

9.8

CVSS Severity Score

EPSS Score62.1140%

EPSS Percentile98.54th

PublishedAug 16, 2021

Last ModifiedNov 7, 2025

Vulnerability Description

Realtek Jungle SDK version v2.x up to v3.4.14B provides a diagnostic tool called 'MP Daemon' that is usually compiled as 'UDPServer' binary. The binary is affected by multiple memory corruption vulnerabilities and an arbitrary command injection vulnerability that can be exploited by remote unauthenticated attackers.

Affected Platforms (CPE)

📦

Realtek

Rtl819x Jungle Software Development Kit

>= 2.0 and <= 3.4.14b

References & Advisories

🔗 https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain

🔗 https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en

🔗 https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf

🔗 https://www.securityfocus.com/archive/1/534765

🔗 https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain

🔗 https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en

🔗 https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf

🔗 https://www.securityfocus.com/archive/1/534765

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