CVE-2026-39906
Critical
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.
SeverityCritical
CVSS10.0
Exploit probability—
ProductUnisys Webperfect Image Suite
PublishedApr 14, 2026
First seenApr 14, 2026
Weakness typeCWE-441CWE-441
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| unisys webperfect_image_suite | 3.0.3960.22604, 3.0.3960.22810 | — |
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