CVE-2021-35392

What it is

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 heap buffer overflow that is present due to unsafe crafting of SSDP NOTIFY messages from received M-SEARCH messages ST header.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

82.1% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-06-23 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2021-08-16 12:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-06-17 03:57 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 82.1% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-08-16 12:15 UTC

Last modified

2026-06-17 03:57 UTC

Exploit probability

82.1% · EPSS, next 30 days

Weakness

CWE-787 · Out-of-bounds write

Record status

Analyzed

Affected

• Realtek rtl819x Jungle Software Development Kit ≤ 3.4.14b

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-35392.md and follow it. Check whether this project is affected by CVE-2021-35392. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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