Vulnerability in Unisys Webperfect Image Suite
CVE-2026-39907
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.010 · change: +0.004
Affected products
- Unisys Webperfect Image Suite — versions 3.0.3960.22810, 3.0.3960.22604
- Unisys Webperfect Image Suite — versions 3.0.3960.22604, 3.0.3960.22810
Weakness classification (CWE)
References
- gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129 (Exploit, technical-description, Third Party Advisory, exploit)
- www.unisys.com/solutions/cai/applications/ (Product, product)
- www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-39907?
- CVE-2026-39907 is a critical-severity vulnerability in Unisys Webperfect Image Suite, classified under External Control of File Name or Path. CVSS score: 10.0/10. Published 2026-04-14.
- How severe is CVE-2026-39907?
- Critical severity. CVSS v3 base score is 10.0 out of 10.