CVE-2021-35394

9.8 CRITICAL CISA KEV - Actively Exploited
Published: August 16, 2021 Modified: November 07, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain
Source: cve@mitre.org
Broken Link Exploit Third Party Advisory
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
Source: cve@mitre.org
Broken Link Patch Vendor Advisory
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf
Source: cve@mitre.org
Patch Vendor Advisory
https://www.securityfocus.com/archive/1/534765
Source: cve@mitre.org
Broken Link Third Party Advisory VDB Entry
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Exploit Third Party Advisory
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Patch Vendor Advisory
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory
https://www.securityfocus.com/archive/1/534765
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Third Party Advisory VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

9 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
94.2%
100th percentile
Exploitation Status
Actively Exploited
Remediation due: 2021-12-24

Weaknesses (CWE)

CWE-78

Affected Vendors

realtek

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