A vulnerability was found in ZyXEL ZyWALL 10 up to 3.49. It has been rated as problematic. Affected by this issue is some unknown functionality of the component ARP Packet Handler. The manipulation leads to denial of service.
This vulnerability is handled as CVE-2002-0438. The attack may be launched remotely. There is no exploit available.
It is recommended to upgrade the affected component.
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CVE-2002-0438 | ZyXEL ZyWALL 10 up to 3.49 ARP Packet denial of service (XFDB-8436 / BID-4272)
A vulnerability was found in ZyXEL ZyWALL 10 up to 3.49. It has been rated as problematic. Affected by this issue is some unknown functionality of the component ARP Packet Handler. The manipulation leads to denial of service. This…
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CVE-2002-0438
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title: Detect Exploitation - CVE-2002-0438 | ZyXEL ZyWALL 10 up to 3.49 ARP Packet denial of service (XFDB-8436 / BID-4272)
id: 3feeb4ae-b0f6-4443-8ac6-79b18a2bccf8
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "CVE-2002-0438 | ZyXEL ZyWALL 1" ascii wide
condition:
any of them
}INFRASTRUCTURE BLAST RADIUS & EXPOSURE
Live-Vektor: LOCAL
LOCALIZED
Perimeter & Ingress
Geringes Risiko
Lateral Pivot & AD
GEFÄHRDET (80%)
Crown Jewels & DB
Geringes Risiko
Supply Chain Reach
Geringes Risiko
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich CVE-2002-0438 | ZyXEL ZyWALL 10 up to 3..... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
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- 2. Patch-Applikation: Hersteller-Hotfix einspielen oder betroffene Daemons in isolierte DMZ-Segmente überführen.
- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
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