CVE-2021-35394
Detail
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.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
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This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference
CISA's BOD 22-01 and Known
Exploited Vulnerabilities Catalog for further guidance and requirements.
| Vulnerability Name |
Date Added |
Due Date |
Required Action |
| Realtek Jungle SDK Remote Code Execution Vulnerability |
12/10/2021 |
12/24/2021 |
Apply updates per vendor instructions. |
Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
|
NVD-CWE-Other
|
Other |
👁 cwe source acceptance level
NIST
|
|
CWE-78
|
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') |
CISA-ADP
|
Change History
14 change records found show changes
CVE Modified by CISA-ADP
6/16/2026 11:57:29 PM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2025-02-04T19:37:46.125761Z","id":"CVE-2021-35394","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by MITRE
6/16/2026 11:57:29 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]
|
Modified Analysis by NIST
11/07/2025 2:01:01 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference Type |
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394 Types: US Government Resource
|
CVE Modified by CISA-ADP
10/21/2025 8:17:38 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394
|
CVE Modified by CISA-ADP
10/21/2025 4:18:38 PM
| Action |
Type |
Old Value |
New Value |
| Removed |
Reference |
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394
|
CVE Modified by CISA-ADP
10/21/2025 3:19:09 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394
|
Reanalysis by NIST
8/13/2025 11:22:59 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CPE Configuration |
OR
*cpe:2.3:a:realtek:jungle_sdk:*:*:*:*:*:*:*:* versions from (including) 2.0 up to (including) 3.4.14b
|
OR
*cpe:2.3:a:realtek:rtl819x_jungle_software_development_kit:*:*:*:*:*:*:*:* versions from (including) 2.0 up to (including) 3.4.14b
|
| Changed |
Reference Type |
CVE: https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain Types: Exploit, Third Party Advisory
|
CVE: https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain Types: Broken Link, Exploit, Third Party Advisory
|
| Changed |
Reference Type |
MITRE: https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain Types: Exploit, Third Party Advisory
|
MITRE: https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain Types: Broken Link, Exploit, Third Party Advisory
|
Modified Analysis by NIST
4/17/2025 2:31:27 PM
| Action |
Type |
Old Value |
New Value |
| Changed |
CPE Configuration |
OR
*cpe:2.3:a:realtek:realtek_jungle_sdk:*:*:*:*:*:*:*:* versions from (including) 2.0 up to (including) 3.4.14b
|
OR
*cpe:2.3:a:realtek:jungle_sdk:*:*:*:*:*:*:*:* versions from (including) 2.0 up to (including) 3.4.14b
|
| Changed |
Reference Type |
CVE: https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en Types: Patch, Vendor Advisory
|
CVE: https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en Types: Broken Link, Patch, Vendor Advisory
|
| Changed |
Reference Type |
CVE: https://www.securityfocus.com/archive/1/534765 Types: Third Party Advisory, VDB Entry
|
CVE: https://www.securityfocus.com/archive/1/534765 Types: Broken Link, Third Party Advisory, VDB Entry
|
| Changed |
Reference Type |
MITRE: https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en Types: Patch, Vendor Advisory
|
MITRE: https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en Types: Broken Link, Patch, Vendor Advisory
|
| Changed |
Reference Type |
MITRE: https://www.securityfocus.com/archive/1/534765 Types: Third Party Advisory, VDB Entry
|
MITRE: https://www.securityfocus.com/archive/1/534765 Types: Broken Link, Third Party Advisory, VDB Entry
|
CVE Modified by CISA-ADP
2/04/2025 3:15:43 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CWE |
CWE-78
|
CVE Modified by CVE
11/21/2024 1:12:17 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain
|
| Added |
Reference |
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
|
| Added |
Reference |
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf
|
| Added |
Reference |
https://www.securityfocus.com/archive/1/534765
|
CVE Modified by MITRE
5/14/2024 5:17:28 AM
| Action |
Type |
Old Value |
New Value |
CWE Remap by NIST
8/08/2023 10:21:49 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CWE |
CWE-77
CWE-787
|
NVD-CWE-Other
|
CWE Remap by NIST
6/28/2022 10:11:45 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CWE |
NVD-CWE-noinfo
|
CWE-77
CWE-787
|
Initial Analysis by NIST
8/26/2021 10:00:03 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CVSS V2 |
NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C)
|
| Added |
CWE |
NIST NVD-CWE-noinfo
|
| Added |
CPE Configuration |
OR
*cpe:2.3:a:realtek:realtek_jungle_sdk:*:*:*:*:*:*:*:* versions from (including) 2.0 up to (including) 3.4.14b
|
| Changed |
Reference Type |
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain No Types Assigned
|
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain Exploit, Third Party Advisory
|
| Changed |
Reference Type |
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en No Types Assigned
|
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en Patch, Vendor Advisory
|
| Changed |
Reference Type |
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf No Types Assigned
|
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf Patch, Vendor Advisory
|
| Changed |
Reference Type |
https://www.securityfocus.com/archive/1/534765 No Types Assigned
|
https://www.securityfocus.com/archive/1/534765 Third Party Advisory, VDB Entry
|
Quick Info
CVE Dictionary Entry: CVE-2021-35394 NVD
Published Date: 08/16/2021 NVD
Last Modified: 06/16/2026
Source: MITRE
|
