A vulnerability was found in SonicWall SMA1000. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Tunnel TOTP Authentication. This manipulation causes improper handling of unicode encoding.
This vulnerability is tracked as CVE-2026-4116. The attack is possible to be carried out remotely. No exploit exists.
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CVE-2026-4116 | SonicWall SMA1000 Tunnel TOTP Authentication unicode encoding (SNWLID-2026-0003 / EUVD-2026-20908)
A vulnerability was found in SonicWall SMA1000. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Tunnel TOTP Authentication. This manipulation causes improper handling of unicode…
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IoC Intelligence (1 Indikatoren)
CVE-2026-4116
CTI Threat Relationship Graph2 Knoten / 1 Relationen
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title: Detect Exploitation - CVE-2026-4116 | SonicWall SMA1000 Tunnel TOTP Authentication unicode encoding (SNWLID-2026-0003 / EUVD-2026-20908)
id: c32ae0e3-0a5e-4400-a8f6-89ce262d3bb1
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-2026-4116 | SonicWall SMA1" 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-2026-4116 | SonicWall SMA1000 Tunnel.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
- 1. Perimeter-Inspektion: Relevante Portfreigaben und exponierte Endpunkte unverzüglich scannen.
- 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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