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4.1

PaperCut MF: HP Multifunction Device Badge-Swipe Data Corruption

CVE-2026-6180 · published 6 months ago
Summary

PaperCut MF software may incorrectly process data from certain HP multifunction devices under specific network conditions. This can lead to a user being logged in to the device with someone else's identity, potentially allowing unauthorized access. Update the software to the latest version to prevent this issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
papercut papercut_mf < 24.1.9
>= 25.0.2, < 25.0.10
cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*
papercut papercut_ng < 24.1.9
>= 25.0.2, < 25.0.10
cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*
Original advisory text
A race condition exists in PaperCut MF when processing badge-swipe data from certain HP multifunction devices. Under specific network conditions involving dropped packets and out-of-order sequence ...
A race condition exists in PaperCut MF when processing badge-swipe data from certain HP multifunction devices. Under specific network conditions involving dropped packets and out-of-order sequence counters, the server may incorrectly process fragmented data chunks. If a sequence reset notification fails to reach the server, the server may reject the initial data chunk while erroneously accepting subsequent chunks before a connection reset completes.



This leads to the registration of a truncated badge ID string. While this typically results in an authentication failure, the vulnerability is compounded in environments utilizing custom badge-ID post-processing scripts. In such configurations, the truncated string may be transformed into a valid ID belonging to a different user, leading to unauthorized session establishment (Incorrect User Login) on the device.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.1 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-20Improper Input Validation
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
Timeline
Published5 May 2026
Updated4 Nov 2026
First seen5 May 2026
Sources
CVE-2026-6180 · NVD
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