What’s Vulnerable › Vulnerabilities

CVE-2026-39907: Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via WCF SOAP

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-14 · updated 2026-07-24
• Weakness: CWE-73

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.

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-wcf-soap

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