A vulnerability classified as problematic was found in libexpat project Libexpat up to 2.8.3. Impacted is an unknown function. Such manipulation leads to denial of service. This vulnerability is documented as CVE-2026-76956. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised. Weiterlesen
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CVE-2026-76956 | libexpat project Libexpat up to 2.8.3 denial of service (WID-SEC-2026-2944)
A vulnerability classified as problematic was found in libexpat project Libexpat up to 2.8.3. Impacted is an unknown function. Such manipulation leads to denial of service. This vulnerability is documented as CVE-2026-76956. The attack can…
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IoC Intelligence (1 Indikatoren)
CVE-2026-76956
IR-PLAYBOOK-VULN-REMEDIATION
MEDIUMSOC Incident Playbook: Vulnerability Remediation & Verification
1-Click Detection Engineering: Sigma & YARA Rules
SOC Readytitle: Detect Exploitation - CVE-2026-76956 | libexpat project Libexpat up to 2.8.3 denial of service (WID-SEC-2026-2944)
id: 011f66cd-87af-497f-877c-d61e2bdf8d28
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-2026-76956 | libexpat proj" ascii wide
condition:
any of them
}Infrastructure Blast Radius & Exposure
LOCALIZEDPerimeter & External Ingress
GEFÄHRDET (85%)
Lateral Movement & Pivot
Geringes Risiko
Data Stores & Crown Jewels
Geringes Risiko
Supply Chain & Cascading Reach
Geringes Risiko
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich CVE-2026-76956 | libexpat project Libexp.... 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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