CVE-2026-8793
Received Received - Intake

Authentication Bypass in PaperCut NG/MF

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: PaperCut

Description
PaperCut NG/MF does not properly restrict excessive authentication attempts within its login component. An unauthenticated remote attacker can exploit this vulnerability to perform unrestricted brute-force or credential-stuffing attacks without triggering account lockout or rate-limiting mechanisms in some configurations.

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Meta Information

Published
2026-08-03
Last Modified
2026-08-03
Generated
2026-08-03
AI Q&A
2026-08-03
EPSS Evaluated
N/A
NVD
CVE-2026-8793
EUVD
EUVD-2026-52224

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
papercut ng-mf *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-307 The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.

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Executive Summary

This vulnerability in PaperCut NG/MF allows unauthenticated remote attackers to repeatedly attempt logins without restrictions. The system fails to enforce account lockout or rate limits, enabling brute-force or credential-stuffing attacks.

Detection Guidance

Detecting this vulnerability requires monitoring for excessive authentication attempts against PaperCut NG/MF services. Check logs for repeated failed login attempts without account lockouts. Use network traffic analysis tools like tcpdump or Wireshark to inspect authentication requests targeting PaperCut's login endpoints. Enable verbose logging in PaperCut if possible to track authentication attempts.

Impact Analysis

Attackers could gain unauthorized access to accounts by guessing passwords. This may lead to data breaches, unauthorized system changes, or further network compromise depending on user privileges.

Compliance Impact

This vulnerability could potentially violate compliance with GDPR and HIPAA due to insufficient authentication controls. Unrestricted brute-force attacks may lead to unauthorized access to sensitive data, which is a violation of data protection requirements under these regulations.

Mitigation Strategies

Immediately apply the latest security patches from PaperCut if available. Configure account lockout policies and rate-limiting in PaperCut's authentication settings. Restrict network access to PaperCut services using firewalls or network segmentation. Monitor authentication logs for suspicious activity and consider temporary disabling external access if no patch is available.

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