A new, unpatched, vulnerability has been discovered in the Windows Print Spooler and is being tracked under CVE-2021-34481. Discovered by Jacob Baines at Dragos, this one requires local access, so it is less of a nightmare than PrintNightmare, but unfortunately the result of exploitation is SYSTEM level privileges.
Intelligence View
New Windows Print Spooler Vulnerability - CVE-2021-34481, (Mon, Jul 19th)
A new, unpatched, vulnerability has been discovered in the Windows Print Spooler and is being tracked under CVE-2021-34481. Discovered by Jacob Baines at Dragos, this one requires local access, so it is less of a nightmare than…
SOC Incident Playbook: Vulnerability Remediation & Verification
title: Detect Exploitation - New Windows Print Spooler Vulnerability - CVE-2021-34481, (Mon, Jul 19th)
id: 359ac750-f159-4009-8312-b4e1817235f6
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 = "New Windows Print Spooler Vuln" ascii wide
condition:
any of them
}tsecurity.de Cognitive Threat RAG
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich New Windows Print Spooler Vulnerability .... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
- 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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