Vulnerability · Published Apr 14, 2026 · Assigned by VulnCheck

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

High 7.0

In plain English

A high-severity security flaw in WebPerfect Image Suite from Unisys. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 4.0)7.0High

Exploit odds (30 days)0.6%top 50.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Unisys	WebPerfect Image Suite	3.0.3960.228103.0.3960.22604

Weakness: CWE-73 · Vector: 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

References

https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129 technical-description, exploit
https://www.unisys.com/solutions/cai/applications/ product
https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-wcf-soap third-party-advisory