CVE-2026-82078RCE por carga de clases insegura en PaperCut MF/NG
PaperCut NG/MF contains an unsafe reflection vulnerability that allows an attacker to manipulate system configuration parameters and execute arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process. This vulnerability can be chained with CVE-2026-81578.
Ver en NVDAnálisis
PaperCut MF y PaperCut NG presentan una vulnerabilidad de carga dinámica de clases que permite la ejecución de código Java arbitrario con privilegios de sistema. Un atacante con capacidad de manipular parámetros de configuración puede comprometer totalmente el servidor. Esta vulnerabilidad está siendo explotada activamente y puede ser encadenada con otros fallos de seguridad.
Roles relevantes
Severidad
N/A
CISA KEV
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
Descripción técnica
An unsafe dynamic class loading vulnerability exists in the database connection utilities of PaperCut MF and PaperCut NG. The application instantiates database driver classes based on configurable driver names without validating against an allowlist of approved drivers. If an attacker can manipulate system configuration parameters, this enables the execution of arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process.