CVE-2026-39906
CriticalCVSS 10.0Exploitation Probability (EPSS)
Low risk49th percentile - higher than 49% of all known CVEs
Summary
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.
Risk Assessment
An attacker can obtain NTLMv2 machine-account hashes, which can be used for privilege escalation or lateral movement within the network, compromising the entire domain.
Recommendation
Immediately upgrade Unisys WebPerfect Image Suite to a version that does not contain this vulnerability, or disable the deprecated .NET Remoting channel if possible.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS