CVE-2026-6180 (GCVE-0-2026-6180)
Vulnerability from cvelistv5
Published
2026-05-05 06:19
Modified
2026-05-05 14:13
Severity ?
4.1 (Medium) - CVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N
CWE
  • CWE-367 - Time-of-check time-of-use (TOCTOU) race condition
  • CWE-20 - Improper input validation
Summary
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
Impacted products
Vendor Product Version
PaperCut PaperCut NG/MF Version: 0   ≤
Version: 0   ≤
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