CVE-2026-39906

HIGH

Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via .NET Remoting

Title source: cna

Description

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.

References (3)

[Product] https://www.unisys.com/solutions/cai/applications/

[Third Party Advisory] https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-net-remoting

[Exploit] https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129

Scores

CVSS v4 7.0

EPSS 0.0020

EPSS Percentile 42.5%

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

Details

CWE

CWE-441

Status published

Products (2)

Unisys/WebPerfect Image Suite 3.0.3960.22604

Unisys/WebPerfect Image Suite 3.0.3960.22810

Published Apr 14, 2026

Tracked Since Apr 15, 2026