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OpenAdvisories
High · 8.8 Known exploited Scanner template Public exploit CVE-2026-81578 EUVD-2026-67713GHSA-44wc-j6f2-7fjr

PaperCut MF/NG: Authentication Bypass

Published Aug 28, 2026 · Updated Sep 13, 2026 · Assigned by PaperCut

Vendor: PaperCut Product: PaperCut MF/NG

Description

An improper access control vulnerability exists in the web management interface of PaperCut MF and PaperCut NG. Under specific conditions, unauthenticated remote requests targeting administrative functions can trigger backend actions prior to the completion of access validation checks. This allows an unauthenticated remote attacker to modify certain system configurations.

Affected products

VendorProductAffectedFixed
PaperCut PaperCut MF/NG < 24.1.10, 25.0.0 – < 25.0.13, 26.0.0 – < 26.0.5 24.1.10

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

GitHub 2 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 1

References