# CVE-2021-35394: Realtek Jungle SDK Remote Code Execution Vulnerability

- Exploited (CISA KEV): yes, added 2021-12-10
- Published: 2021-08-16
- CVSS: 9.8 CRITICAL (v3.1)
- EPSS: 99.9% (100th percentile)
- CWE: CWE-78, CWE-138

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Before feed history | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2021-35394 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2021-35394