{"id":"CVE-2026-6180","state":"PUBLISHED","title":"PaperCut MF: Card truncation on HP readers","description":"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.\n\n\n\nThis 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.","publishedAt":"2026-05-05T06:19:44.725Z","updatedAt":"2026-05-05T14:13:10.635Z","severity":{"score":4.1,"label":"Medium","version":"4.0","vector":"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","source":"PaperCut"},"assigner":"PaperCut","products":["PaperCut PaperCut NG/MF"],"affected":[{"vendor":"PaperCut","product":"PaperCut NG/MF","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"24.1.9","versionType":"semver"},{"version":"0","status":"affected","lessThan":"25.0.10","versionType":"semver"}]}],"references":["https://www.papercut.com/kb/Main/papercut-ng-mf-and-papercut-hive-security-bulletin-may-2026/"],"weaknesses":["CWE-367","CWE-20"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/6xxx/CVE-2026-6180.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6180","state":"PUBLISHED","datePublished":"2026-05-05T06:19:44.725Z","dateUpdated":"2026-05-05T14:13:10.635Z","assignerShortName":"PaperCut","assignerOrgId":"eb41dac7-0af8-4f84-9f6d-0272772514f4","dateReserved":"2026-04-13T05:21:02.099Z"},"containers":{"cna":{"title":"PaperCut MF: Card truncation on HP readers","descriptions":[{"lang":"en","value":"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.\n\n\n\nThis 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":[{"vendor":"PaperCut","product":"PaperCut NG/MF","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"24.1.9","versionType":"semver"},{"version":"0","status":"affected","lessThan":"25.0.10","versionType":"semver"}]}],"references":[{"url":"https://www.papercut.com/kb/Main/papercut-ng-mf-and-papercut-hive-security-bulletin-may-2026/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"PHYSICAL","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","subIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":4.1,"vectorString":"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-367","lang":"en","description":"CWE-367 Time-of-check time-of-use (TOCTOU) race condition","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20 Improper input validation","type":"CWE"}]}],"providerMetadata":{"shortName":"PaperCut","orgId":"eb41dac7-0af8-4f84-9f6d-0272772514f4","dateUpdated":"2026-05-05T06:19:44.725Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-05T13:47:26.998229Z","id":"CVE-2026-6180","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-05T14:13:10.635Z"}}]}}}