CVE-2021-35393: realtek rtl819x_jungle_software_development_kit Out-of-bounds Write
Vulnerability summary
CVE-2021-35393 is a high (CVSS 10.0) Out-of-bounds Write vulnerability in realtek rtl819x_jungle_software_development_kit. EPSS estimates a 68.30% chance of exploitation in the next 30 days, higher than 99.3% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 16-08-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a stack buffer overflow vulnerability that is present due to unsafe parsing of the UPnP SUBSCRIBE/UNSUBSCRIBE Callback header. Successful exploitation of this vulnerability allows remote unauthenticated attackers to gain arbitrary code execution on the affected device.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
68.30%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
-2.04 pp
From 70.33% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (iot-inspector.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Realtek1 product
- rtl819x_jungle_software_development_kit≥ 2.0, ≤ 3.4.14b
1 vendor · 1 product
References
3 links- www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdfX Refsource MISCPatchVendor Advisory
- www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chainX Refsource MISCBroken LinkExploitThird Party Advisory