Page generated: 08 Nov 2026, 06:30 UTC
← Dashboard

CVE-2021-35394

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…

Read full 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.
CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 99.88%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 13 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Industrial Cyber
Press · 06 Oct 2026, 07:00 · Cling botnet uses STUN traffic to conceal command-and-control activity and attacks against vulnerable IoT devices - Industrial Cyber
The Hacker News
Press · 05 Oct 2026, 07:00 · Realtek Jungle SDK Exploit Attempts Deliver Cling Botnet With STUN-Based C2 - The Hacker News
The Hacker News
Press · 30 Jan 2023, 08:00 · Realtek Vulnerability Under Attack: Over 134 Million Attempts to Hack IoT Devices - The Hacker News
Broadcom
Press · 25 Jan 2023, 08:00 · Realtek SDK 2021 vulnerability is still exploited for malware distribution - Broadcom
BleepingComputer
Press · 25 Jan 2023, 08:00 · Malware exploited critical Realtek SDK bug in millions of attacks - BleepingComputer
See all 13 source documents
SecurityWeek
Press · 24 Jan 2023, 08:00 · Attacks Targeting Realtek SDK Vulnerability Ramping Up - SecurityWeek
Unit 42
Press · 24 Jan 2023, 08:00 · Realtek SDK Vulnerability Attacks Highlight IoT Supply Chain Threats - Unit 42
The Hacker News
Press · 14 Apr 2022, 07:00 · New EnemyBot DDoS Botnet Borrows Exploit Code from Mirai and Gafgyt - The Hacker News
Help Net Security
Press · 24 Aug 2021, 07:00 · Realtek SDK vulnerability exploitation attempts detected (CVE-2021-35395) - Help Net Security
CNX Software
Press · 18 Aug 2021, 07:00 · Realtek AP-Router SDK vulnerabilities could impact millions of routers and IoT devices - CNX Software
The Hacker News
Press · 17 Aug 2021, 07:00 · Multiple Flaws Affecting Realtek Wi-Fi SDKs Impact Nearly a Million IoT Devices - The Hacker News
Computing UK
Press · 17 Aug 2021, 07:00 · Realtek Wi-Fi SDK vulnerabilities affect 65 vendors and hundreds of thousands of IoT devices - Computing UK
Help Net Security
Press · 16 Aug 2021, 07:00 · 65 vendors affected by severe vulnerabilities in Realtek chips - Help Net Security

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

024681002 Nov 2026 · OBSERVED EXPLOITATION + LOWER RECENT ATTENTIONHype 1.6Reality 9.005 Nov 2026 · OBSERVED EXPLOITATION + LOWER RECENT ATTENTIONHype 1.3Reality 9.006 Nov 2026 · OBSERVED EXPLOITATION + LOWER RECENT ATTENTIONHype 0.0Reality 9.0Nov 2Nov 5Nov 6

━ Hype Score (Perceived)  ━ Reality threat priority. Definition changes are not new attacks.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 99.9%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-06 00:12:49.640935+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
16 Aug 2021, 07:00
Published
16 Aug 2021, 11:07
Added to the CISA KEV catalog
10 Dec 2021, 00:00
Latest press mention
06 Oct 2026, 07:00
Score calculated
06 Nov 2026, 00:12