CVE-2021-35394

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-35394
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.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0 /10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References
Link Resource
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain Broken Link Exploit Third Party Advisory
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en Broken Link Patch Vendor Advisory
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf Patch Vendor Advisory
https://www.securityfocus.com/archive/1/534765 Broken Link Third Party Advisory VDB Entry
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain Broken Link Exploit Third Party Advisory
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en Broken Link Patch Vendor Advisory
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf Patch Vendor Advisory
https://www.securityfocus.com/archive/1/534765 Broken Link Third Party Advisory VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394 US Government Resource
Configurations

Configuration 1 (hide)

cpe:2.3:a:realtek:rtl819x_jungle_software_development_kit:*:*:*:*:*:*:*:*
History

07 Nov 2025, 19:01

Type Values Removed Values Added
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394 - US Government Resource

22 Oct 2025, 00:17

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394 -

21 Oct 2025, 20:18

Type Values Removed Values Added
References
  • {'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}

21 Oct 2025, 19:19

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394 -
References () https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain - Exploit, Third Party Advisory, Broken Link () https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain - Broken Link, Exploit, Third Party Advisory

13 Aug 2025, 15:22

Type Values Removed Values Added
First Time Realtek rtl819x Jungle Software Development Kit
References () https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain - Exploit, Third Party Advisory () https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain - Exploit, Third Party Advisory, Broken Link
CPE cpe:2.3:a:realtek:jungle_sdk:*:*:*:*:*:*:*:* cpe:2.3:a:realtek:rtl819x_jungle_software_development_kit:*:*:*:*:*:*:*:*

17 Apr 2025, 18:31

Type Values Removed Values Added
References () https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en - Patch, Vendor Advisory () https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en - Broken Link, Patch, Vendor Advisory
References () https://www.securityfocus.com/archive/1/534765 - Third Party Advisory, VDB Entry () https://www.securityfocus.com/archive/1/534765 - Broken Link, Third Party Advisory, VDB Entry
CPE cpe:2.3:a:realtek:realtek_jungle_sdk:*:*:*:*:*:*:*:* cpe:2.3:a:realtek:jungle_sdk:*:*:*:*:*:*:*:*
First Time Realtek jungle Sdk

04 Feb 2025, 20:15

Type Values Removed Values Added
CWE CWE-78

21 Nov 2024, 06:12

Type Values Removed Values Added
References () https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain - Exploit, Third Party Advisory () https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain - Exploit, Third Party Advisory
References () https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en - Patch, Vendor Advisory () https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en - Patch, Vendor Advisory
References () https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf - Patch, Vendor Advisory () https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf - Patch, Vendor Advisory
References () https://www.securityfocus.com/archive/1/534765 - Third Party Advisory, VDB Entry () https://www.securityfocus.com/archive/1/534765 - Third Party Advisory, VDB Entry

08 Aug 2023, 14:21

Type Values Removed Values Added
CWE CWE-787
CWE-77		 NVD-CWE-Other
Information

Published : 2021-08-16 12:15

Updated : 2025-11-07 19:01

NVD link : CVE-2021-35394

Mitre link : CVE-2021-35394

CVE.ORG link : CVE-2021-35394

JSON object : View

Products Affected

realtek

  • rtl819x_jungle_software_development_kit
CWE
NVD-CWE-Other CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')