CVE-2026-6180
published 2026-05-05CVE-2026-6180: A race condition exists in PaperCut MF when processing badge-swipe data from certain HP multifunction devices. Under specific network conditions involving…
PriorityP350high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.23%
13.5th percentile
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.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| papercut | papercut_mf | < 24.1.9 | 24.1.9 |
| papercut | papercut_mf | >= 25.0.2 < 25.0.10 | 25.0.10 |
| papercut | papercut_ng | < 24.1.9 | 24.1.9 |
| papercut | papercut_ng | >= 25.0.2 < 25.0.10 | 25.0.10 |
| papercut | papercut_ng_mf | < 24.1.9 | 24.1.9 |
| papercut | papercut_ng_mf | < 25.0.10 | 25.0.10 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.04.1MEDIUMCVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
PaperCut NG/MF up to 24.1.8/25.0.9 toctou (Nessus ID 313100)
vuldb·2026-05-08·CVSS 4.1
CVE-2026-6180 [MEDIUM] PaperCut NG/MF up to 24.1.8/25.0.9 toctou (Nessus ID 313100)
A vulnerability classified as critical was found in PaperCut NG and MF up to 24.1.8/25.0.9. This affects an unknown function. The manipulation results in time-of-check time-of-use.
This vulnerability is identified as CVE-2026-6180. The attack can be executed remotely. There is not any exploit available.
Upgrading the affected component is advised.
GHSA
GHSA-hqg4-rx24-2464: A race condition exists in PaperCut MF when processing badge-swipe data from certain HP multifunction devices
ghsa_unreviewed·2026-05-05
CVE-2026-6180 [MEDIUM] CWE-20 GHSA-hqg4-rx24-2464: A race condition exists in PaperCut MF when processing badge-swipe data from certain HP multifunction devices
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 u
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-05-05
Published