Vulnerability Intelligence Report
PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector
CVE-2026-82078
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
9.4
CRITICAL
EPSS Probability:1.69%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-470 ↗CWE-470 Use of Externally-Controlled input to select classes or code ('unsafe reflection')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| PaperCut | PaperCut MF/NG | 0 < 24.1.10 (affected), 25.0.0 < 25.0.13 (affected), 26.0.0 < 26.0.5 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | PaperCut Software Pty Ltd · Vendor · Australia |
| Reserved | 2026-08-28T00:13:25 |
| Published | 2026-08-28T11:45:25 |
| Last Updated | 2026-09-13T23:16:32 |
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