RCE in Realtek Rtl819x Jungle Software Development Kit
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.999 (100.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Realtek Rtl819x_jungle_software_development_kit
- N/a — versions n/a
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- cve@mitre.org (VDB Entry, Third Party Advisory, x_refsource_MISC, Broken Link)
- cve@mitre.org (Patch, x_refsource_MISC, Broken Link, Vendor Advisory)
- cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Broken Link)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-35394?
- CVE-2021-35394 is a critical-severity vulnerability in Realtek Rtl819x Jungle Software Development Kit, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-08-16.
- How severe is CVE-2021-35394?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-35394 known to be exploited?
- Yes. CVE-2021-35394 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-12-10), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.