CVE-2026-6418Network attack vector

Administrative file disclosure via unsanitized sync paths

Published May 5, 2026 · Updated May 5, 2026

Absolute path traversal in PaperCut NG/MF before 25.0.11 allows remote authenticated users with admin rights to read local files. The Shared Account Synchronization source-path handler accepts an administrator-supplied absolute path without validating it against an authorized directory list, then parses the selected file and renders its text in the account interface. Exploitation requires administrative access and exposes only files readable by the application service account, including sensitive configuration or system text.

CVSS severity4.6
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Absolute path traversal in PaperCut NG/MF before 25.0.11 allows remote authenticated users with admin rights to read local files. The Shared Account Synchronization source-path handler accepts an administrator-supplied absolute path without validating it against an authorized directory list, then parses the selected file and renders its text in the account interface. Exploitation requires administrative access and exposes only files readable by the application service account, including sensitive configuration or system text.

The record

CVE
CVE-2026-6418
Published
May 5, 2026
Updated
May 5, 2026
Vendor
PaperCut
Product
PaperCut NG/MF
Classifications
CWE-552, CWE-36, T1083, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <25.0.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

PaperCut · PaperCut NG/MFversion=0 <25.0.11

Published CVSS scores

4.9NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.6PaperCutCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-552Files or Directories Accessible to External Parties
CWE-36Absolute Path Traversal
T1083File and Directory Discovery
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo