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CVE-2021-35394 affects the MP Daemon diagnostic component, commonly known as UDPServer, in Realtek Jungle SDK versions 2.0 through 3.4.14B inclusive. Multiple memory corruption flaws and arbitrary command injection permit remote, unauthenticated attackers to execute commands and code on affected devices without user interaction. The vulnerable SDK is embedded in routers, access points, repeaters, and other networking and IoT appliances. Exploitation has been observed delivering multiple botnet malware families, including Mirai, Gafgyt, Mozi, RedGoBot, and Cling.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
43 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability exploited in the ClingSTUN campaign to compromise Internet-facing routers and IoT devices, establishing persistent backdoor access and remotely controlled proxy nodes. The content does not specify its technical mechanism or individually affected products.
A critical remote code execution vulnerability in the Realtek Jungle SDK actively exploited to deploy the Cling botnet. Cling disguises its command-and-control communications as STUN traffic and establishes persistence through startup-file modifications and replacement of the wget binary.
A command execution vulnerability in Realtek SDK UDPServer, exploited to spread ClingSTUN.
A now-patched critical remote code execution vulnerability in Realtek Jungle SDK. Observed exploitation activity delivered the Cling botnet malware, which supports propagation, proxying, tunneling, and denial-of-service attacks.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.