PaperCut NG/MF Critical Zero-Day Exploited in the Wild

Sicherheitsmeldung mit Schweregrad hoch. Sie wird laut CISA-KEV aktiv ausgenutzt und sollte priorisiert behandelt werden. Betroffene Kennungen: CVE-2023-27350. Technische Details im Tab „Originaltext“; empfohlene Schritte in der Checkliste.

Originaltext der Quelle (nicht übersetzt) – die deutsche Zusammenfassung findest du im Tab „Kurzfassung".

Overview On August 27, 2026, PaperCut Software published an urgent security advisory stating that it is investigating active exploitation of a vulnerability affecting PaperCut NG and PaperCut MF. PaperCut has confirmed customer incidents and is treating the issue as a security emergency. At the time of writing, the vulnerability has not been assigned a CVE identifier, and PaperCut has not publicly disclosed a CVSS score, vulnerability class, authentication requirements, or the technical details of the exploit path.PaperCut NG and PaperCut MF are print management platforms commonly deployed within enterprise, education, and other organizational environments. Because the PaperCut Application Server provides web-accessible administrative and application functionality, organizations with servers exposed to the public internet should prioritize remediation and access restriction.PaperCut stated in its advisory that information supplied by a university customer’s security team and digital forensics and incident response team enabled its security response team to reproduce the vulnerability in PaperCut NG and PaperCut MF. On August 28, 2026 at 02:10 AEST, PaperCut released emergency patches for PaperCut NG and PaperCut MF versions 25 and 26.PaperCut has been targeted in the past; in 2023, CVE-2023-27350 was broadly exploited in the wild by multiple threat-actor groups, including ransomware operators. This prior history increases the urgency organizations should address this new zero-day with.PaperCut currently considers all versions of PaperCut NG and PaperCut MF potentially …

Vollständiger Originalartikel ↗

• Betroffenheit im eigenen Stack prüfen (CVE-2023-27350): Versionen/Komponenten abgleichen.
• Originalquelle / Hersteller-Advisory lesen: https://www.rapid7.com/blog/post/etr-papercut-ng-mf-critical-zero-day-exploited-in-the-wild
• Priorität HOCH: laut CISA-KEV aktiv ausgenutzt – bevorzugt patchen.
• Verfügbaren Patch oder Workaround einspielen und dokumentieren.
• Erkennung: Logs und Indikatoren (IoCs) auf Ausnutzung prüfen.