CVE-2021-35395

Realtek Jungle SDK version v2.x up to v3.4.14B provides an HTTP web server exposing a management interface that can be used to configure the access point. Two versions of this management interface exists: one based on Go-Ahead named webs and another based on Boa named boa. Both of them are affected by these vulnerabilities. Specifically, these binaries are vulnerable to the following issues: - stack buffer overflow in formRebootCheck due to unsafe copy of submit-url parameter - stack buffer overflow in formWsc due to unsafe copy of submit-url parameter - stack buffer overflow in formWlanMultipleAP due to unsafe copy of submit-url parameter - stack buffer overflow in formWlSiteSurvey due to unsafe copy of ifname parameter - stack buffer overflow in formStaticDHCP due to unsafe copy of hostname parameter - stack buffer overflow in formWsc due to unsafe copy of 'peerPin' parameter - arbitrary command execution in formSysCmd via the sysCmd parameter - arbitrary command injection in formWsc via the 'peerPin' parameter Exploitability of identified issues will differ based on what the end vendor/manufacturer did with the Realtek SDK webserver. Some vendors use it as-is, others add their own authentication implementation, some kept all the features from the server, some remove some of them, some inserted their own set of features. However, given that Realtek SDK implementation is full of insecure calls and that developers tends to re-use those examples in their custom code, any binary based on Realtek SDK webserver will probably contains its own set of issues on top of the Realtek ones (if kept). Successful exploitation of these issues allows remote attackers to gain arbitrary code execution on the device.

• https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chainBroken Link, Exploit, Third Party Advisory
• https://www.realtek.com/en/cu-1-en/cu-1-taiwan-enBroken Link, Patch, Vendor Advisory
• https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdfPatch
• https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chainBroken Link, Exploit, Third Party Advisory
• https://www.realtek.com/en/cu-1-en/cu-1-taiwan-enBroken Link, Patch, Vendor Advisory
• https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdfPatch
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35395US Government Resource

Published

Aug 16, 2021

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-35388Hospital Management System v 4.0 is vulnerable to Cross Site…5.4
• CVE-2021-3539EspoCRM 6.1.6 and prior suffers from a persistent (type II) …5.4
• CVE-2021-35391Server Side Request Forgery vulnerability found in Deskpro S…7.2
• CVE-2021-35392Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'W…7.5
• CVE-2021-35393Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'W…9.8
• CVE-2021-35394Realtek Jungle SDK version v2.x up to v3.4.14B provides a di…9.8
• CVE-2021-35397A path traversal vulnerability in the static router for Drog…7.5
• CVE-2021-3540By abusing the 'install rpm info detail' command, an attacke…7.2
• CVE-2021-35402PROLiNK PRC2402M 20190909 before 2021-06-13 allows live_api.…10
• CVE-2021-3541A flaw was found in libxml2. Exponential entity expansion at…6.5
• CVE-2021-35413A remote code execution (RCE) vulnerability in course_intro_…8.8
• CVE-2021-35414Chamilo LMS v1.11.x was discovered to contain a SQL injectio…9.8