Is CVE-2021-35394 actively exploited?

CVE-2021-35394 has no public evidence of in-the-wild exploitation as of 2025-11-07.

What is the CVSS score for CVE-2021-35394?

CVE-2021-35394 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-35394?

Patch guidance is available from realtek security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-35394.

Which products are affected by CVE-2021-35394?

1 product: realtek rtl819x jungle software development kit.

Fix CVE-2021-35394 - CRITICAL

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: NVD-CWE-OtherCWE-78 · OS Command Injection

Metadata

Primary Vendor: REALTEK
Published: 8/16/2021
Last Modified: 11/7/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-35394

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary