# 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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-35394
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2021-12-10; CISA due date 2021-12-24
- EPSS: 99.87% (percentile 100.0)
- Detection templates only, no public exploit found: 1 Nuclei template
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-04)
- Weakness: CWE-78
- Published: 2021-08-16

## Affected

- realtek:rtl819x_jungle_software_development_kit

## References

- [other] https://www.securityfocus.com/archive/1/534765
- [other] https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
- [other] https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf
- [other] https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.