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Description

Unisys WebPerfect Image Suite versions 3.0.3960.22810 and 3.0.3960.22604 expose an unauthenticated WCF SOAP endpoint on TCP port 1208 that accepts unsanitized file paths in the ReadLicense action's LFName parameter, allowing remote attackers to trigger SMB connections and leak NTLMv2 machine-account hashes. Attackers can submit crafted SOAP requests with UNC paths to force the server to initiate outbound SMB connections, exposing authentication credentials that may be relayed for privilege escalation or lateral movement within the network.

PUBLISHED Reserved 2026-04-07 | Published 2026-04-14 | Updated 2026-05-08 | Assigner VulnCheck




HIGH: 7.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N

Problem types

External Control of File Name or Path

Product status

Default status
unknown

3.0.3960.22810 (custom)
affected

3.0.3960.22604 (custom)
affected

Timeline

2025-12-15:VulnCheck, as the third-party coordinator and intermediary, initiated outreach to Unisys and other potentially-related entities.

Credits

Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp. finder

VulnCheck coordinator

References

gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129 technical-description exploit

www.unisys.com/solutions/cai/applications/ product

www.vulncheck.com/...-suite-ntlmv2-hash-leakage-via-wcf-soap third-party-advisory

cve.org (CVE-2026-39907)

nvd.nist.gov (CVE-2026-39907)

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