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CVE-2026-82078— PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector

Quick assessment

Affected
PaperCut PaperCut MF/NG
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PaperCut MF是PaperCut公司的一套多功能打印机控制软件。 PaperCut MF和PaperCut NG 24.1.10之前版本、25.0.13之前版本和26.0.5之前版本存在代码注入漏洞，该漏洞源于数据库连接工具中不安全动态类加载，应用程序基于可配置驱动名称实例化数据库驱动类时未对照已批准驱动程序的允许列表进行验证，可能导致攻击者操纵系统配置参数，在PaperCut服务器进程安全上下文下执行任意Java字节码。

CVSS 9.4 · Critical KEV EPSS 63.05% · P99

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
PaperCut PaperCut MF/NG < 24.1.10 affected
25.0.0< 25.0.13 affected
26.0.0< 26.0.5 affected
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I. Basic Information for CVE-2026-82078

Vulnerability Information
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Vulnerability Title
PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部可控制的输入来选择类或代码(不安全的反射)
Source: CVE Program / CVE List V5
Vulnerability Title
PaperCut MF 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PaperCut MF是PaperCut公司的一套多功能打印机控制软件。 PaperCut MF和PaperCut NG 24.1.10之前版本、25.0.13之前版本和26.0.5之前版本存在代码注入漏洞，该漏洞源于数据库连接工具中不安全动态类加载，应用程序基于可配置驱动名称实例化数据库驱动类时未对照已批准驱动程序的允许列表进行验证，可能导致攻击者操纵系统配置参数，在PaperCut服务器进程安全上下文下执行任意Java字节码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
PaperCut PaperCut MF/NG 0 ~ 24.1.10 -

II. Public POCs for CVE-2026-82078

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III. Intelligence Information for CVE-2026-82078

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Vendor Advisories for CVE-2026-82078 (1)

IV. Related Vulnerabilities

Same product: PaperCut MF/NG
Same vendor: PaperCut
Same weakness: CWE-470