A vulnerability was found in Oracle Java SE, GraalVM for JDK and GraalVM Enterprise Edition. It has been rated as critical. The impacted element is an unknown function of the component RMI. The manipulation leads to improper authentication.
This vulnerability is documented as CVE-2026-21925. The attack can be initiated remotely. There is not any exploit available.
Upgrading the affected component is advised.
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CVE-2026-21925 | Oracle Java SE/GraalVM for JDK/GraalVM Enterprise Edition RMI improper authentication (EUVD-2026-3584)
A vulnerability was found in Oracle Java SE, GraalVM for JDK and GraalVM Enterprise Edition. It has been rated as critical. The impacted element is an unknown function of the component RMI. The manipulation leads to improper…
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CVE-2026-21925
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title: Detect Exploitation - CVE-2026-21925 | Oracle Java SE/GraalVM for JDK/GraalVM Enterprise Edition RMI improper authentication (EUVD-2026-3584)
id: 9da370ee-6408-43b2-88c7-32c5a3910a93
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-2026-21925 | Oracle Java S" 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-2026-21925 | Oracle Java SE/GraalVM .... 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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