{"id":"CVE-2021-35394","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-35394","generatedAt":"2026-10-31T13:57:27.641Z","title":"Realtek Jungle SDK Remote Code Execution Vulnerability","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.","published":"2021-08-16T12:15:07.000Z","lastModified":"2026-06-17T03:57:29.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-78"],"affected":["realtek/rtl819x jungle software development kit"],"epss":{"score":0.99877,"percentile":0.99964,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2021-12-10","dueDate":"2021-12-24","knownRansomwareCampaignUse":"Unknown","notes":"Apply updates per vendor instructions.\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-35394"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 24 December 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain","tags":["Broken Link","Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en","tags":["Broken Link","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.securityfocus.com/archive/1/534765","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain","tags":["Broken Link","Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en","tags":["Broken Link","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.securityfocus.com/archive/1/534765","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35394","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-35394","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}