{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-39906","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-04-07T20:57:06.209Z","datePublished":"2026-04-14T21:21:21.739Z","dateUpdated":"2026-04-23T14:38:47.738Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-04-23T14:38:47.738Z"},"title":"Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via .NET Remoting","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-441","description":"CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')","type":"CWE"}]}],"affected":[{"vendor":"Unisys","product":"WebPerfect Image Suite","versions":[{"status":"affected","version":"3.0.3960.22810","versionType":"semver"},{"status":"affected","version":"3.0.3960.22604","versionType":"semver"}],"defaultStatus":"unknown"}],"descriptions":[{"lang":"en","value":"Unisys WebPerfect Image Suite versions 3.0.3960.22810 and 3.0.3960.22604 expose a deprecated .NET Remoting TCP channel that allows remote unauthenticated attackers to leak NTLMv2 machine-account hashes by supplying a Windows UNC path as a target file argument through object-unmarshalling techniques. Attackers can capture the leaked NTLMv2 hash and relay it to other hosts to achieve privilege escalation or lateral movement depending on network configuration and patch level.","supportingMedia":[{"type":"text/html","base64":false,"value":"Unisys WebPerfect Image Suite versions 3.0.3960.22810 and 3.0.3960.22604 expose a deprecated .NET Remoting TCP channel that allows remote unauthenticated attackers to leak NTLMv2 machine-account hashes by supplying a Windows UNC path as a target file argument through object-unmarshalling techniques. Attackers can capture the leaked NTLMv2 hash and relay it to other hosts to achieve privilege escalation or lateral movement depending on network configuration and patch level.<br>"}]}],"references":[{"url":"https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129","tags":["technical-description","exploit"]},{"url":"https://www.unisys.com/solutions/cai/applications/","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-net-remoting","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","subIntegrityImpact":"HIGH","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":"HIGH","baseScore":7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N"}}],"timeline":[{"time":"2025-12-15T17:00:00.000Z","lang":"en","value":"VulnCheck, as the third-party coordinator and intermediary, initiated outreach to Unisys and other potentially-related entities."}],"credits":[{"lang":"en","value":"Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp.","type":"finder"},{"lang":"en","value":"VulnCheck","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.1"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-16T13:50:39.653259Z","id":"CVE-2026-39906","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-16T13:50:58.130Z"}}]}}