What’s Vulnerable › Vulnerabilities

CVE-2026-39906: Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via .NET Remoting

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-14 · updated 2026-07-24
• Weakness: CWE-441

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.

Affected products

• Unisys WebPerfect Image Suite: 3.0.3960.22604, 3.0.3960.22810

References

• https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129
• https://www.unisys.com/solutions/cai/applications/
• https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-net-remoting

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