CVE-2026-39907 — CRITICAL (10.0)

Vulnerability 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.

CVSS Score

10.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Unisys	Webperfect Image Suite	3.0.3960.22604

Related Weaknesses (CWE)

CWE-73

References

https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129ExploitThird Party Advisory
https://www.unisys.com/solutions/cai/applications/Product
https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-lThird Party Advisory

FAQ

What is CVE-2026-39907?

CVE-2026-39907 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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 LF...

How severe is CVE-2026-39907?

CVE-2026-39907 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-39907?

Check the references section above for vendor advisories and patch information. Affected products include: Unisys Webperfect Image Suite.