PaperCut MF/PaperCut NG up to 24.1.9/25.0.12/26.0.4 Database Connection Utilities externally-controlled input to select classes or code

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in PaperCut MF and PaperCut NG up to 24.1.9/25.0.12/26.0.4. The impacted element is an unknown function of the component Database Connection Utilities. The manipulation leads to use of externally-controlled input to select classes or code. This vulnerability is referenced as CVE-2026-82078. Remote exploitation of the attack is possible. Furthermore, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in PaperCut MF and PaperCut NG up to 24.1.9/25.0.12/26.0.4. It has been rated as problematic. This issue affects some unknown functionality of the component Database Connection Utilities. The manipulation with an unknown input leads to a use of externally-controlled input to select classes or code vulnerability. Using CWE to declare the problem leads to CWE-470. The product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at papercut.com. The identification of this vulnerability is CVE-2026-82078 since 08/28/2026. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation requires an enhanced level of successful authentication. Technical details are unknown but an exploit is available.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 341348 (PaperCut MF < 24.1.9.76515 / 25.x < 25.0.12.76509 / 26.x < 26.0.4.76507 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 08/31/2026 with a due date of 09/14/2026:

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 BO

Upgrading to version 24.1.10, 25.0.13 or 26.0.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (341348) and EUVD (EUVD-2026-67714). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use of externally-controlled input to select classes or code
CWE: CWE-470
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 341348
Nessus Name: PaperCut MF < 24.1.9.76515 / 25.x < 25.0.12.76509 / 26.x < 26.0.4.76507 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: MF/PaperCut NG 24.1.10/25.0.13/26.0.5

Timelineinfo

08/28/2026 Advisory disclosed
08/28/2026 +0 days CVE reserved
08/28/2026 +0 days VulDB entry created
09/14/2026 +17 days VulDB entry last update

Sourcesinfo

Advisory: papercut.com
Status: Confirmed

CVE: CVE-2026-82078 (🔒)
GCVE (CVE): GCVE-0-2026-82078
GCVE (VulDB): GCVE-100-396755
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/28/2026 18:03
Updated: 09/14/2026 04:45
Changes: 08/28/2026 18:03 (66), 08/29/2026 07:35 (1), 08/31/2026 16:45 (2), 08/31/2026 16:59 (12), 08/31/2026 21:07 (2), 09/14/2026 04:45 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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