CVE-2026-6180

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.papercut.com/kb/Main/papercut-ng-mf-and-papercut-hive-security-bulletin-may-2026/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:papercut:papercut_mf::::::::
	cpe:2.3:a:papercut:papercut_mf::::::::
	cpe:2.3:a:papercut:papercut_ng::::::::
	cpe:2.3:a:papercut:papercut_ng::::::::

History

No history.

Information

Published : 2026-05-05 07:16

Updated : 2026-06-17 11:00

NVD link : CVE-2026-6180

Mitre link : CVE-2026-6180

CVE.ORG link : CVE-2026-6180

JSON object : View

Products Affected

papercut

papercut_mf
papercut_ng

CWE

CWE-20

Improper Input Validation

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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